When the adulteress woman was brought before Jesus as a pawn in the Pharisee's trap Jesus responded with "let he who is without sin cast the first stone".
While this is a beautiful reminder of our own deeply sinful nature and shows us the lesson to now throw stones at (or from) glass houses, it is even more than that:
Jesus was saying that only someone without sin could cast the stone upon this sinful woman. Of course, this eliminated the entire crowd, but who did it NOT eliminate? Jesus. Jesus was, in fact, without sin, and therefore, by his own words, capable of casting the stone at this woman. But. He. Did. Not.
The crowd wanted to condemn but couldn't -- Jesus could have condemned but didn't!
Chew on that.