2 Peter 3:17-18
Verse 18 makes it clear that there is a contrast. Peter says, ". . . but grow." Verse 17 is a warning: ". . . beware lest you also fall . . . being led away with the error of the wicked."
The command is to grow, so if the contrast that he is establishing in our minds is to be met, the positive part of the instruction is that effort has to be made in order to grow. If we are not making an effort to grow, the only alternative is to go in reverse. We begin to degenerate if we do not make an effort to grow.
II Peter 3:17 (Moffatt) Now, beloved, you are forewarned: mind you that you are not carried away by the error of the lawless and so lose your proper footing;
My attention is on this verse 17 where he says, "mind you," rather than "beware." He turns it into something that is positive. "Beware" could mean to just look around to make sure that one is safe. But "mind you" says, "Hey, turn your attention to focus on this!"
We can see from the combination of these two verses that effort must be made to produce growth or we will likely fall into the error of the wicked. In other words, doing nothing regarding our spiritual responsibilities is akin to doing nothing regarding our physical responsibilities pertaining to our physical health.
So we are faced with a choice. We are forewarned. Something has to be done; we cannot just stand still. Nor can we just drift. Some effort has to be made to ensure growth takes place.
John W. Ritenbaugh