“Once, Amir al-Mu’minin (Ali ibn abu Talib) (a.s.) during his court session, had sat leaning against a wall that was bent. Certain people asked him not to sit near the defective wall. Amir al-Mu’minin (Ali ibn abu Talib) (a.s.) said, ‘This is like a man’s guarding his death,' (Futility of Guardian against death). When the Imam moved away, the wall crumbled. The Imam said, ‘Amir al-Mu’minin (Ali ibn abu Talib) (a.s.) would often do such and similar things and that was because of certainty.’”