SHAFAQNA – It is narrated from Imam Ali (AS) who said: The most amazing part of human’s body is the heart and the heart is the source of wisdom as well as anti-wisdom. If it gets involved with desires, greed humiliates it, and excessive greed destroys it; and if it is dominated with hopelessness, the grief kills it; any negligence is harmful and any extravagance destroys it [1].
[1] Elalul Sharaye’a, Vol. 1, page 109.