Complete Bible Study Guide

What Does the Bible Say About Sincerity?

39 Scripture references with full text and commentary

Understanding Sincerity in the Bible

Explore what the Bible says about sincerity. This collection of 11 key Scripture passages reveals God's wisdom and guidance on this important theme.

39
Total Verses
8
Old Testament
31
New Testament

Top 10 Verses About Sincerity

  1. 1
    Joshua 24:14
    Now therefore fear the LORD, and serve him in sincerity and in truth: and put away the gods which your fathers served on the other side of the flood, and in Egypt; and serve ye the LORD.
    KJV
  2. 2
    1 Chronicles 12:33
    Of Zebulun, such as went forth to battle, expert in war, with all instruments of war, fifty thousand, which could keep rank: they were not of double heart. expert: or, rangers of battle, or, ranged in battle keep: or, set the battle in array not: Heb. without a heart and a heart
    KJV
  3. 3
    Psalms 5:9
    For there is no faithfulness in their mouth; their inward part is very wickedness; their throat is an open sepulchre; they flatter with their tongue. faithfulness: or, stedfastness their mouth: Heb. his mouth, that is, the mouth of any of them very: Heb. wickednesses
    KJV
  4. 4
    Psalms 32:2
    Blessed is the man unto whom the LORD imputeth not iniquity, and in whose spirit there is no guile.
    KJV
  5. 5
    Psalms 34:13
    Keep thy tongue from evil, and thy lips from speaking guile.
    KJV
  6. 6
    Psalms 55:21
    The words of his mouth were smoother than butter, but war was in his heart: his words were softer than oil, yet were they drawn swords.
    KJV
  7. 7
    Isaiah 38:3
    And said, Remember now, O LORD, I beseech thee, how I have walked before thee in truth and with a perfect heart, and have done that which is good in thy sight. And Hezekiah wept sore. sore: Heb. with great weeping
    KJV
  8. 8
    Jeremiah 17:9
    The heart is deceitful above all things, and desperately wicked: who can know it?
    KJV
  9. 9
    Matthew 18:35
    So likewise shall my heavenly Father do also unto you, if ye from your hearts forgive not every one his brother their trespasses.
    KJV
  10. 10
    John 1:47
    Jesus saw Nathanael coming to him, and saith of him, Behold an Israelite indeed, in whom is no guile!
    KJV

Subtopics of Sincerity

Does not exempt from guilt
Forgiveness of enemies must be sincere
Servants must render honest service
Whatever is done must be done with
Jesus was an example
Servants of should be examples of
Opposed to fleshly wisdom
Should characterize
Our love toward
Our love toward Jesus
Our service toward God
Our faith
Our love to one another
Our whole conduct
The preaching of the gospel
A characteristic of the doctrines of the gospel
The gospel sometimes preached without
Evil people are devoid of
Exhortations
Prayer for, on behalf of others

Old Testament: What Does the Bible Say About Sincerity? (8 Verses)

Now therefore fear the LORD, and serve him in sincerity and in truth: and put away the gods which your fathers served on the other side of the flood, and in Egypt; and serve ye the LORD.
Of Zebulun, such as went forth to battle, expert in war, with all instruments of war, fifty thousand, which could keep rank: they were not of double heart. expert: or, rangers of battle, or, ranged in battle keep: or, set the battle in array not: Heb. without a heart and a heart
For there is no faithfulness in their mouth; their inward part is very wickedness; their throat is an open sepulchre; they flatter with their tongue. faithfulness: or, stedfastness their mouth: Heb. his mouth, that is, the mouth of any of them very: Heb. wickednesses
Blessed is the man unto whom the LORD imputeth not iniquity, and in whose spirit there is no guile.
Keep thy tongue from evil, and thy lips from speaking guile.
The words of his mouth were smoother than butter, but war was in his heart: his words were softer than oil, yet were they drawn swords.
And said, Remember now, O LORD, I beseech thee, how I have walked before thee in truth and with a perfect heart, and have done that which is good in thy sight. And Hezekiah wept sore. sore: Heb. with great weeping
The heart is deceitful above all things, and desperately wicked: who can know it?

New Testament: What Does the Bible Say About Sincerity? (31 Verses)

So likewise shall my heavenly Father do also unto you, if ye from your hearts forgive not every one his brother their trespasses.
Jesus saw Nathanael coming to him, and saith of him, Behold an Israelite indeed, in whom is no guile!
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
But the hour cometh, and now is, when the true worshippers shall worship the Father in spirit and in truth: for the Father seeketh such to worship him.
God is a Spirit: and they that worship him must worship him in spirit and in truth.
Let love be without dissimulation. Abhor that which is evil; cleave to that which is good.
Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened bread of sincerity and truth. the feast: or, holyday
Whether therefore ye eat, or drink, or whatsoever ye do, do all to the glory of God.
For our rejoicing is this, the testimony of our conscience, that in simplicity and godly sincerity, not with fleshly wisdom, but by the grace of God, we have had our conversation in the world, and more abundantly to you-ward.
For we are not as many, which corrupt the word of God: but as of sincerity, but as of God, in the sight of God speak we in Christ. corrupt: or, deal deceitfully with in Christ: or, of Christ
I speak not by commandment, but by occasion of the forwardness of others, and to prove the sincerity of your love.
Wherefore shew ye to them, and before the churches, the proof of your love, and of our boasting on your behalf.
Servants, be obedient to them that are your masters according to the flesh, with fear and trembling, in singleness of your heart, as unto Christ;
Not with eyeservice, as menpleasers; but as the servants of Christ, doing the will of God from the heart;
With good will doing service, as to the Lord, and not to men:
Grace be with all them that love our Lord Jesus Christ in sincerity. Amen. in sincerity: or, with incorruption To the Ephesians written from Rome, by Tychicus.
That ye may approve things that are excellent; that ye may be sincere and without offence till the day of Christ; approve: or, try are: or, differ
The one preach Christ of contention, not sincerely, supposing to add affliction to my bonds:
For our exhortation was not of deceit, nor of uncleanness, nor in guile:
But as we were allowed of God to be put in trust with the gospel, even so we speak; not as pleasing men, but God, which trieth our hearts.
For neither at any time used we flattering words , as ye know, nor a cloke of covetousness; God is witness:
Now the end of the commandment is charity out of a pure heart, and of a good conscience, and of faith unfeigned:
When I call to remembrance the unfeigned faith that is in thee, which dwelt first in thy grandmother Lois, and thy mother Eunice; and I am persuaded that in thee also.
In all things shewing thyself a pattern of good works: in doctrine shewing uncorruptness, gravity, sincerity,
Seeing ye have purified your souls in obeying the truth through the Spirit unto unfeigned love of the brethren, see that ye love one another with a pure heart fervently:
Wherefore laying aside all malice, and all guile, and hypocrisies, and envies, and all evil speakings,
As newborn babes, desire the sincere milk of the word, that ye may grow thereby :
Who did no sin, neither was guile found in his mouth:
My little children, let us not love in word, neither in tongue; but in deed and in truth.
The Revelation of Jesus Christ, which God gave unto him, to shew unto his servants things which must shortly come to pass; and he sent and signified it by his angel unto his servant John:
And in their mouth was found no guile: for they are without fault before the throne of God.

How to Study What the Bible Says About Sincerity

  1. 1

    Begin by reading through every verse listed on this page, noting which ones speak most directly to your current season of life. Write them down and revisit them throughout the week.

  2. 2

    Use a concordance or the search tools on this site to find additional passages about sincerity. Look for patterns across both the Old and New Testaments to gain a complete picture of what God reveals on this subject.

  3. 3

    Study the context of each verse. Read the surrounding chapter to understand who was speaking, who the audience was, and what circumstances prompted the passage. Context prevents misapplication.

  4. 4

    Memorise at least one key verse about sincerity and meditate on it daily. Scripture memory transforms thinking and equips you to apply God's Word in real-time situations.

Practical Application

Studying what the Bible says about sincerity is only the beginning. Scripture is meant to be lived out in daily obedience and faith. Here are practical steps to apply these truths:

  • Identify one area of your life where the biblical teaching on sincerity needs to be applied more consistently. Write a specific, actionable step you can take this week.

  • Share what you have learned about sincerity with a fellow believer or in a small group setting. Teaching others solidifies your own understanding and encourages mutual growth.

  • Pray through the key verses about sincerity, asking God to reveal how His Word applies to your relationships, decisions, and daily habits.

How Well Do You Know What the Bible Says About Sincerity?

You have studied 39 verses about sincerity. Now test your knowledge with chapter-by-chapter quizzes covering the books where these verses appear.

Frequently Asked Questions

What does the Bible say about sincerity?
Explore what the Bible says about sincerity. This collection of 11 key Scripture passages reveals God's wisdom and guidance on this important theme. The Bible contains 39 key verses about sincerity spanning both Old and New Testaments.
How many Bible verses about sincerity are there?
There are 39 key Bible verses about sincerity compiled in this study guide, drawn from books across both the Old and New Testaments.
What is the best verse about sincerity?
One of the most well-known and frequently cited verses about sincerity is Joshua 24:14 — "Now therefore fear the LORD, and serve him in sincerity and in truth: and put away the gods which your fathers served on the other side of the flood, ..."
Where in the Bible does it talk about sincerity?
Sincerity is discussed throughout the Bible in both the Old and New Testaments. You can find 39 references to this topic across multiple books including the Psalms, Proverbs, the Gospels, and the Epistles.

Continue Studying Sincerity

Topics Included

This page consolidates Bible verses from 2 related topics:

sincerity