The implication of Peter’s use of the word train is very sobering. It is possible to train ourselves in the wrong direction! That is what these false teachers had done. They had practiced greed so well that they had become experts in it—they had trained their hearts in greed! So there is a sense in which we are growing in our character every day. The question is, in which direction are we growing? Are we growing toward godly character or ungodly character? Are we growing in love or selfishness, in