4 That thou mightest know the certainty of those things, wherein thou hast been instructed.
4 so that you may know the certainty of the things you have been taught.
4 that you may have certainty concerning the things you have been taught.
4 so you can know beyond the shadow of a doubt the reliability of what you were taught. A Childless Couple Conceives
4 that you may know the certainty of those things in which you were instructed.
4 so you can be certain of the truth of everything you were taught.
Matthew Henry's Commentary on Luke 1:4
Commentary on Luke 1:1-4
(Read Luke 1:1-4)
Luke will not write of things about which Christians may safely differ from one another, and hesitate within themselves; but the things which are, and ought to be surely believed. The doctrine of Christ is what the wisest and best of men have ventured their souls upon with confidence and satisfaction. And the great events whereon our hopes depend, have been recorded by those who were from the beginning eye-witnesses and ministers of the word, and who were perfected in their understanding of them through Divine inspiration.