Luke 1:4

that thou mightest know the certainty concerning the things wherein thou wast instructed.

so that you may know the certainty of the things about which you have been instructed.

that you may have certainty concerning the things you have been taught.

That thou mightest know the certainty of those things, wherein thou hast been instructed.

so that you may know the exact truth about the things you have been taught.

so that you may know the certainty of the things you have been taught.

so you can be certain of the truth of everything you were taught.

that you might know the certainty concerning the things in which you were instructed.