SHAFAQNA – Imam Ali (AS) was asked: What is belief? Imam (AS) replied: Belief has four main elements;
1) Patience
2) Certainty
3) Justice
4) Jihad [1].
Of course each element has also been described separately in Nahjul Balaghah and authentic narrations by Imam Ali (AS).
[1] Nahjul Balaghah, Short Elequent Saying Number 31.