[أم بدر الدين]

Heart
Beware! verily there is a piece of flesh in the body of man, which when good, the whole body is good; and when bad, the whold body is bad, and that is the heart.

Muhammad said, "O Wabisah! are you come to ask what is goodness and what is badness?" Wabisah said, "Yes, I am come for that." Then He joined his fingers and struck them upon Wabisah's breast, that is made a sign towards his heart, and said, "Ask the question from thine own heart." This he repeated three times aloud and said, "Goodness is a thing from which thy heart findeth firmness and rest; and badness is a thing which throweth thee into doubt, although men may acquit thee."