Allahu Akbar!
On the authority of Abu Sa'id al-Khudri (may Allah be pleased with him), who said that the Messenger of Allah (peace be upon him) said:
Allah will say to the inhabitant of Paradise: O inhabitants of Paradise! They will say: O our Lord, we present ourselves and are at Your pleasure, and goodness rests in Your hands. Then He will say: Are you contented? And they will say: And how should we not be contented, O Lord, when You have given to us that which You have given to no one else of Your creation? Then He will say: Would you not like Me to give you something better than that? And they will say: O Lord and what thing is better than that? And He will say: I shall cause My favour to descend upon you and thereafter shall never be displeased with you.
It was related by al-Bukhari (also by Muslim and at-Tirmidhi).
A person will only be able to completely enjoy the
bounties of Jannat when he knows that the owner of
these bounties is pleased with him and will never
become angry with him. His enjoyment of these bounties
will increase when he knows that it is impossible for him
to lose them. 