King James Version

What Does Luke 1:18 Mean?

Luke 1:18 in the King James Version says “And Zacharias said unto the angel, Whereby shall I know this? for I am an old man, and my wife well stricken in years . — study this verse from Luke chapter 1 with commentary, cross-references, and original Greek word analysis.

And Zacharias said unto the angel, Whereby shall I know this? for I am an old man, and my wife well stricken in years .

Luke 1:18 · KJV


Context

16

And many of the children of Israel shall he turn to the Lord their God.

17

And he shall go before him in the spirit and power of Elias, to turn the hearts of the fathers to the children, and the disobedient to the wisdom of the just; to make ready a people prepared for the Lord. to the wisdom: or, by the wisdom

18

And Zacharias said unto the angel, Whereby shall I know this? for I am an old man, and my wife well stricken in years .

19

And the angel answering said unto him, I am Gabriel, that stand in the presence of God; and am sent to speak unto thee, and to shew thee these glad tidings.

20

And, behold, thou shalt be dumb, and not able to speak, until the day that these things shall be performed, because thou believest not my words, which shall be fulfilled in their season.


Commentary

KJV Study Commentary
Zacharias's question 'Whereby shall I know this?' echoes Abraham's question (Gen 15:8) but lacks Abraham's faith. Despite angelic visitation and clear promise, Zacharias demands a sign, revealing doubt where there should be trust. His appeal to natural impossibility ('I am an old man') shows reliance on human reason over divine power. This stands in stark contrast to Mary's submissive faith (v38). Zacharias's unbelief, though understandable humanly, demonstrates how even the righteous can falter in faith when confronted with God's impossible promises.

KJV Study — Public Domain

Historical & Cultural Context

Zacharias had witnessed miraculous temple service and received direct angelic revelation, yet his rational mind struggled with biological impossibility. His doubt reflects the common human tension between faith and sight, promise and present reality.

Reflection Questions

  1. How can even faithful believers struggle with doubt when God's promises seem impossible?
  2. What is the difference between asking for understanding and demanding proof?
  3. How does Zacharias's doubt contrast with Mary's faith in responding to God's word?

Original Language Analysis

Greek · 23 words
καὶ1 of 23

And

G2532

and, also, even, so then, too, etc.; often used in connection (or composition) with other particles or small words

εἶπεν2 of 23

said

G2036

to speak or say (by word or writing)

Ζαχαρίας3 of 23

Zacharias

G2197

zacharias (i.e., zechariah), the name of two israelites

πρὸς4 of 23

unto

G4314

a preposition of direction; forward to, i.e., toward (with the genitive case, the side of, i.e., pertaining to; with the dative case, by the side of,

τὸν5 of 23
G3588

the (sometimes to be supplied, at others omitted, in english idiom)

ἄγγελον6 of 23

the angel

G32

compare g0034) (to bring tidings); a messenger; especially an "angel"; by implication, a pastor

Κατὰ7 of 23

Whereby

G2596

(prepositionally) down (in place or time), in varied relations (according to the case (genitive, dative or accusative) with which it is joined)

τί8 of 23
G5101

an interrogative pronoun, who, which or what (in direct or indirect questions)

γνώσομαι9 of 23

shall I know

G1097

to "know" (absolutely) in a great variety of applications and with many implications (as follow, with others not thus clearly expressed)

τοῦτο10 of 23

this

G5124

that thing

ἐγὼ11 of 23

I

G1473

i, me

γάρ12 of 23

for

G1063

properly, assigning a reason (used in argument, explanation or intensification; often with other particles)

εἰμι13 of 23

am

G1510

i exist (used only when emphatic)

πρεσβύτης14 of 23

an old man

G4246

an old man

καὶ15 of 23

And

G2532

and, also, even, so then, too, etc.; often used in connection (or composition) with other particles or small words

16 of 23
G3588

the (sometimes to be supplied, at others omitted, in english idiom)

γυνή17 of 23

wife

G1135

a woman; specially, a wife

μου18 of 23

my

G3450

of me

προβεβηκυῖα19 of 23

well stricken

G4260

to walk forward, i.e., advance (literally, or in years)

ἐν20 of 23

in

G1722

"in," at, (up-)on, by, etc

ταῖς21 of 23
G3588

the (sometimes to be supplied, at others omitted, in english idiom)

ἡμέραις22 of 23

years

G2250

day, i.e., (literally) the time space between dawn and dark, or the whole 24 hours (but several days were usually reckoned by the jews as inclusive of

αὐτῆς23 of 23
G846

the reflexive pronoun self, used (alone or in the comparative g1438) of the third person, and (with the proper personal pronoun) of the other persons


Study Guide

Historical Context

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

Theological Significance

Luke 1:18 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 Luke 1:18 from Treasury of Scripture Knowledge

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