The Apostle Peter
2 Peter 1:6ESV·traditional attribution

and knowledge with self-control, and self-control with steadfastness, and steadfastness with godliness,

Matthew Henry Presbyterian @wholebiblehenry

In these words the apostle comes to the chief thing intended in this epistle - to excite and engage them to advance in grace and holiness, they having already obtained precious faith, and been made partakers of the divine nature. This is a very good beginning, but it is not to be rested in, as if we were already perfect.

Commenting on 2 Peter 1:5-11

John Gill Reformed Baptist @doctorgill

And to knowledge, temperance,.... Avoiding all excess in eating and drinking, and all impure and unclean lusts; for it signifies nothing what a man knows, or professes to know, if his life is a scene of intemperance and debauchery: this seems to be levelled against the followers or Simon Magus, who ascertained salvation to knowledge, though the life was ever so impure, Moreover, this may...

Albert Barnes Presbyterian @notesbybarnes

Verse 6. And to knowledge temperance. On the meaning of the word temperance, , and . The word here refers to the mastery over all our evil inclinations and appetites. We are to allow none of them to obtain control over us. . This would include, of course, abstinence from intoxicating drinks; but it would also embrace all evil passions and propensities.