Ye therefore, beloved, seeing ye know these things before, beware lest ye also, being led away with the error of the wicked, fall from your own stedfastness.
Ye - warned by the case of those "unlearned and unstable" persons (2 Peter 3:16). Know ... before - the event.
Led away with - the term, as Peter remembers, used by Paul of Barnabas' being 'carried' х sunapeechthee (G4879)] (Galatians 2:13), led away with, Peter and the other Jews in their hypocrisy. Wicked, х athesmoon (G113)] - 'lawless,' as 2 Peter 2:7.
Fall from - grace (Galatians 5:4): the true source of "stedfastness" or stability in contrast with the "unstable" (2 Peter 3:16): "established" (2 Peter 1:12): all kindred terms (Jude 1:20-21).