Christ warns that we must do everything possible to annihilate sin - surgically going right to the heart or mind: the level of thought and imagination.
Though relatively neutral at its inception, human nature is subject to a deadly magnetic pull toward self-centeredness, deceit, and sin.
The Hebrews perceived color differently than we do, assigning symbolic significance to a number of different colors as they associate with concrete objects.
Sodomites were industrious people, but they cared nothing for God, mirroring the worst aspects of modern Israel. We need to make sure that we live soberly.