出淤泥而不染
Lilies are whitest in a blackamoor's hand.

eg：He was brought up in slum and became president of the firm, lilies are whitest in a blackamoor's hand.

中英俚语俗语来源：宋·周敦颐·爱莲说：“余独爱莲之出淤泥而不染，濯清涟而不妖，中通外直，不蔓不枝。”

反义词：近朱者赤，近墨者黑 Touch pitch, and you will be defiled.