Luke.1.4

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

Luke.1.4

so you can know beyond the shadow of a doubt the reliability of what you were taught.

Luke.1.4

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

Luke.1.4

that you may know the certainty of those things in which you were instructed.