KJV:
For when for the time ye ought to be teachers, ye have need that one teach you again which be the first principles of the oracles of God; and are become such as have need of milk, and not of strong meat.
NASB:
For though by this time you ought to be teachers, you have need again for someone to teach you the elementary principles of the oracles of God, and you have come to need milk and not solid food.
KJV:
He that saith he abideth in him ought himself also so to walk, even as he walked.
NASB:
the one who says he abides in Him ought himself to walk in the same manner as He walked.
KJV:
Hereby perceive we the love of God, because he laid down his life for us: and we ought to lay down our lives for the brethren.
NASB:
We know love by this, that He laid down His life for us; and we ought to lay down our lives for the brethren.