For certainly, you have listened to him, and you have been instructed in him, according to the truth that is in Jesus:
if so be that ye have heard him, and have been taught by him, as the truth is in Jesus:
Assuming that you have really heard Him and been taught by Him, as [all] Truth is in Jesus [embodied and personified in Him],
if so be that ye heard him, and were taught in him, even as truth is in Jesus:
Since you really listened to him and you were taught how the truth is in Jesus,