And to knowledge, self-control; and to self-control, perseverance; and to perseverance, godliness
NIV
And in [exercising] knowledge [develop] self-control, and in [exercising] self-control [develop] steadfastness (patience, endurance), and in [exercising] steadfastness [develop] godliness (piety)
AMP
And to knowledge temperance; and to temperance patience; and to patience godliness;
KJV
For this very reason, make every effort to add to your faith goodness; and to goodness, knowledge
NIV
For this very reason, adding your diligence [to the divine promises], employ every effort in exercising your faith to develop virtue (excellence, resolution, Christian energy), and in [exercising] virtue [develop] knowledge (intelligence)
AMP
And beside this, giving all diligence, add to your faith virtue; and to virtue knowledge;
KJV
Until we all reach unity in the faith and in the knowledge of the Son of God and become mature, attaining to the whole measure of the fullness of Christ.
NIV
[That it might develop] until we all attain oneness in the faith and in the comprehension of the [full and accurate] knowledge of the Son of God, that [we might arrive] at really mature manhood (the completeness of personality which is nothing less than the standard height of Christ's own perfection), the measure of the stature of the fullness of the Christ and the completeness found in Him.
AMP
Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ:
KJV
He must not be a recent convert, or he may become conceited and fall under the same judgment as the devil.
NIV
He must not be a new convert, or he may [develop a beclouded and stupid state of mind] as the result of pride [be blinded by conceit, and] fall into the condemnation that the devil [once] did. [Isa. 14:12-14.]AMP
Not a novice, lest being lifted up with pride he fall into the condemnation of the devil.
KJV