[28] Take heed unto yourselves, and to all the flock, over the which the Holy Ghost hath made overseers, to feed the church of God, which he hath purchased with his own blood. [29] I know that after departing shall grievous wolves enter in among not sparing the flock. [30] Also of own selves men arise, speaking perverse things, to draw away disciples after them. [31] Therefore watch, and remember, that by the space of three years I ceased not to warn every one night and day with tears.