King James Version

What Does Joshua 1:8 Mean?

Joshua 1:8 in the King James Version says “This book of the law shall not depart out of thy mouth; but thou shalt meditate therein day and night, that thou mayest ...” — study this verse from Joshua chapter 1 with commentary, cross-references, and original Hebrew word analysis.

“This book of the law shall not depart out of thy mouth; but thou shalt meditate therein day and night, that thou mayest observe to do according to all that is written therein: for then thou shalt make thy way prosperous, and then thou shalt have good success. have: or, do wisely”

Joshua 1:8 · KJV

Context

6

Be strong and of a good courage: for unto this people shalt thou divide for an inheritance the land, which I sware unto their fathers to give them. unto this: or, thou shalt cause this people to inherit the land, etc

7

Only be thou strong and very courageous, that thou mayest observe to do according to all the law, which Moses my servant commanded thee: turn not from it to the right hand or to the left, that thou mayest prosper whithersoever thou goest. prosper: or, do wisely

8

This book of the law shall not depart out of thy mouth; but thou shalt meditate therein day and night, that thou mayest observe to do according to all that is written therein: for then thou shalt make thy way prosperous, and then thou shalt have good success. have: or, do wisely

9

Have not I commanded thee? Be strong and of a good courage; be not afraid, neither be thou dismayed: for the LORD thy God is with thee whithersoever thou goest.

10

Then Joshua commanded the officers of the people, saying,

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Commentary

KJV Study Commentary
The command begins with a prohibition: "This book of the law shall not depart out of thy mouth" (lo-yamush sefer hatorah hazeh mipicha, לֹא־יָמוּשׁ סֵפֶר הַתּוֹרָה הַזֶּה מִפִּיךָ). The verb yamush (יָמוּשׁ, "depart") means to move away, withdraw, or cease. God commands that Torah remain constantly on Joshua's lips—not merely stored in memory but actively spoken, recited, and taught. "Out of thy mouth" emphasizes verbal engagement with Scripture, not merely intellectual knowledge. This oral dimension was crucial in predominantly oral cultures where Scripture was memorized, recited, and passed down through spoken repetition.

The positive command follows: "but thou shalt meditate therein day and night" (vehagita bo yomam valaylah, וְהָגִיתָ בּוֹ יוֹמָם וָלָיְלָה). The Hebrew hagah (הָגָה, "meditate") originally meant to mutter, murmur, or speak in low tones—suggesting audible repetition and pondering of Scripture. This wasn't passive reading but active, repetitive engagement that internalized God's word. "Day and night" indicates constant, continuous meditation—Scripture should occupy one's thinking throughout all activities, not merely during formal study times. This anticipates Psalm 1:2, which describes the blessed person as one who meditates on God's law "day and night."

The purpose clause explains why: "that thou mayest observe to do according to all that is written therein" (lemaan tishmor la'asot kekhol-hakatub bo, לְמַעַן תִּשְׁמֹר לַעֲשׂוֹת כְּכָל־הַכָּתוּב בּוֹ). Meditation leads to obedience. The verb shamar (שָׁמַר, "observe") means to guard, keep, or watch carefully, while asah (עָשָׂה, "do") means to act or accomplish. Knowledge of Scripture must result in careful, comprehensive obedience to "all that is written." The promise concludes: "for then thou shalt make thy way prosperous, and then thou shalt have good success" (ki-az tatzliach et-derakecha ve'az taskil, כִּי־אָז תַּצְלִיחַ אֶת־דְּרָכֶךָ וְאָז תַּשְׂכִּיל). The word tatzliach (תַּצְלִיחַ, "prosper") means to succeed or advance, while taskil (תַּשְׂכִּיל, "have good success") means to act wisely or prudently. Success in Joshua's mission depends not primarily on military strategy or political skill but on meditation and obedience to God's word.

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Historical & Cultural Context

This command came at Joshua's commissioning after Moses' death, as Israel prepared to cross the Jordan and conquer Canaan. "This book of the law" likely refers to the Torah (Pentateuch), particularly Deuteronomy, which Moses had recently completed and placed beside the ark (Deuteronomy 31:24-26). Ancient Near Eastern kings often received written law codes to guide governance (Code of Hammurabi, Hittite law codes), but Israel's uniqueness was that their law came directly from Yahweh and governed all of life, not merely civil matters.

The emphasis on meditation "day and night" reflects ancient Israelite educational practice. Children were taught Scripture orally, memorizing extensive portions through repetition (Deuteronomy 6:4-9). Professional scribes and priests preserved written texts, but most people engaged Scripture through hearing, memorization, and recitation. This oral engagement created deep internalization—Scripture shaped thinking patterns, influenced decision-making, and provided interpretive frameworks for understanding life. The practice continues in Jewish tradition through daily recitation of Shema and study of Torah.

The connection between meditation, obedience, and success established a principle that runs throughout Scripture. Psalm 1 describes the blessed person who meditates on God's law day and night, becoming like a fruitful tree. Jesus taught that building on His words results in stability and security (Matthew 7:24-27). James warns against being hearers-only rather than doers (James 1:22-25). Paul commands Timothy to give attention to reading, doctrine, and meditation, so his progress may be evident (1 Timothy 4:13-15). True prosperity in biblical terms isn't primarily material wealth but successful accomplishment of God's purposes through obedient application of His revealed will.

Reflection Questions

  1. How much of your thinking throughout the day is shaped by Scripture versus by cultural narratives, personal anxieties, or worldly ambitions?
  2. What would change in your daily schedule and priorities if you took seriously the command to meditate on God's word "day and night"?
  3. In what specific areas are you treating Scripture as information to know rather than instruction to obey, and what would comprehensive obedience look like?
  4. How does understanding biblical prosperity as successful accomplishment of God's purposes challenge contemporary prosperity gospel teaching that equates blessing with material wealth?
  5. What practical disciplines could help you move from passive Bible reading to active meditation that internalizes Scripture and produces obedience?

Original Language Analysis

Hebrew · 23 words
לֹֽא1 of 23
H3808

not (the simple or abs. negation); by implication, no; often used with other particles

יָמ֡וּשׁ2 of 23

“shall not depart”

H4185

to withdraw (both literally and figuratively, whether intransitive or transitive)

סֵפֶר֩3 of 23

“This book”

H5612

properly, writing (the art or a document); by implication, a book

הַתּוֹרָ֨ה4 of 23

“of the law”

H8451

a precept or statute, especially the decalogue or pentateuch

הַזֶּ֜ה5 of 23
H2088

the masculine demonstrative pronoun, this or that

מִפִּ֗יךָ6 of 23

“out of thy mouth”

H6310

the mouth (as the means of blowing), whether literal or figurative (particularly speech); specifically edge, portion or side; adverbially (with prepos

וְהָגִ֤יתָ7 of 23

“but thou shalt meditate”

H1897

to murmur (in pleasure or anger); by implication, to ponder

בּוֹ֙8 of 23
H0
יוֹמָ֣ם9 of 23

“therein day”

H3119

daily

וָלַ֔יְלָה10 of 23

“and night”

H3915

properly, a twist (away of the light), i.e., night; figuratively, adversity

לְמַ֙עַן֙11 of 23
H4616

properly, heed, i.e., purpose; used only adverbially, on account of (as a motive or an aim), teleologically, in order that

תִּשְׁמֹ֣ר12 of 23

“that thou mayest observe”

H8104

properly, to hedge about (as with thorns), i.e., guard; generally, to protect, attend to, etc

לַֽעֲשׂ֔וֹת13 of 23

“to do”

H6213

to do or make, in the broadest sense and widest application

כְּכָל14 of 23
H3605

properly, the whole; hence, all, any or every (in the singular only, but often in a plural sense)

הַכָּת֖וּב15 of 23

“according to all that is written”

H3789

to grave, by implication, to write (describe, inscribe, prescribe, subscribe)

בּ֑וֹ16 of 23
H0
כִּי17 of 23
H3588

(by implication) very widely used as a relative conjunction or adverb (as below); often largely modified by other particles annexed

אָ֛ז18 of 23
H227

at that time or place; also as a conjunction, therefore

תַּצְלִ֥יחַ19 of 23

“prosperous”

H6743

to push forward, in various senses (literal or figurative, transitive or intransitive)

אֶת20 of 23
H853

properly, self (but generally used to point out more definitely the object of a verb or preposition, even or namely)

דְּרָכֶ֖ךָ21 of 23

“thy way”

H1870

a road (as trodden); figuratively, a course of life or mode of action, often adverb

וְאָ֥ז22 of 23
H227

at that time or place; also as a conjunction, therefore

תַּשְׂכִּֽיל׃23 of 23

“and then thou shalt have good success”

H7919

to be (causatively, make or act) circumspect and hence, intelligent

Study Guide

Historical Context

This verse is found in the book of Joshua. Understanding the historical and cultural background helps illuminate its meaning for the original audience and for us today.

Theological Significance

Joshua 1:8 contributes to our understanding of God's character and His relationship with humanity. Consider how this verse connects to the broader themes of Scripture.

Cross-References

Verses related to Joshua 1:8 from Treasury of Scripture Knowledge

Psalms 119:15Psalms 19:14Colossians 3:16Proverbs 3:1Deuteronomy 29:9John 14:21

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