Acts 20:29-32

I know that after I am gone, [false teachers like] ferocious wolves will come in among you, not sparing the flock; even from among your own selves men will arise, speaking perverse and distorted things, to draw away the disciples after themselves [as their followers]. Therefore be continually alert, remembering that for three years, night or day, I did not stop admonishing and advising each one [of you] with tears. And now I commend you to God [placing you in His protective, loving care] and [I commend you] to the word of His grace [the counsel and promises of His unmerited favor]. His grace is able to build you up and to give you the [rightful] inheritance among all those who are sanctified [that is, among those who are set apart for God’s purpose—all believers].