All perfect praise be to Allah, the Lord of the worlds. I testify that there is none worthy of worship except Allah and that Muhammad is His slave and Messenger.
It someone enters Paradise, then he attains a happiness after which there is no sadness nor misery, and he has attained the true bliss.
In Paradise, there is what the souls desire and what is a comfort for the eyes; and he gets in it more than what he desires and more than what he could ever imagine.
Allah says (what means): {They will have whatever they wish therein, and with Us is more.} [Quran 50:35]
Therefore, a rational person must occupy himself with what brings him closer to Allah and makes him attain His pleasure and enter His Paradise; that is by having true belief and doing righteous deeds.
Allah knows best.