Al-Imam Ali (p.b.u.h), said:

Hadith n. 99
Amir al-mu’minin, peace be upon him, heard a man recite: Verily we are Allah’s and verily to Him shall we return (Qur’an, 2:156). Then he said: Our saying inna li’llah (Verily we are Allah’s) is an admission of His Majesty over us and our saying wa inna ilayhi raji ‘un (and verily to Him shall we return) is an admission of our being mortal.

Hadith n. 100
Some people praised Amir al-mu’minin, peace be upon him, to his face, then he said: O My God! You know me better than myself, and I know myself better than they do. O My God! Make us better than what they think and forgive us what they do not know.

Hadith n. 101
Amir al-mu’minin, peace be upon him, said: Fulfilment of (others’) needs becomes a lasting virtue in three ways: regarding it small so that it attains bigness, concealing it so that it may manifest itself, and doing it quickly so that it becomes pleasant.

Source: https://www.al-islam.org/nahjul-balagha-part-2-letters-and-sayings