O 'Ali! The following three are one's noblest traits: being fair, treating others as equals, and remembering God, the Blessed, the High in all situations.
If a learned man is asked about something he does not know, it is obligatory on him to state 'Allah knows best.' But if he is not learned then he has no right even to state that much.
Imam Ja'far as-Sadiq (A)