"Remember now your Creator in the days of your youth, before the difficult days come, and the years draw near when you say, "I have no pleasure in them." (Eccl. 12:1) "But we all, with unveiled face, beholding as in a mirror the glory of the Lord, are being transformed into the same image from glory to glory, just as by the Spirit of the Lord." (2 Cor. 3:18)

"I once saw, lying side by side in a sculptor's workshop, two heads made of metal. One was perfect. All the features of a manly, noble face were clear and distinct. The other, however, had scarcely a single, recognizable human characteristic. It was marred and spoiled. The sculptor said, 'This one is badly distorted because the metal was allowed to cool before it was stamped out, and therefore it wouldn't take the impression.'" (From Bible Illustrator)

Likewise, many souls might have been stamped with the likeness of the Savior while they were still warm with the vitality of early youth, but they allowed themselves to grow cold through pleasure, sin, and error. Thus, now they are misinformed, hardened, and lost forever.