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

Thatª thou mightest knowª° the¹ certaintyª of² those things,ª whereinª¹ thou hast been instructed.ª°

Thatª thou mightest knowª° the¹ certainetieª of² those thingsª whereinª¹ thou hast bene instructed.ª°

that thou mayest know the truth of those doctrines in which thou hast been instructed.

that thou mayest know the truth of the statements, which thou hast been taught.

ἵνα ἐπιγνῷς περὶ ὧν κατηχήθης λόγων τὴν ἀσφάλειαν.

so thou-might-have-had-acquainted-upon about of-which thou-was-reverberated-down-unto of-forthees to-the-one to-an-un-failing-of.