Especially in Christian theology, but also in some other religions, the beatific vision is the direct perception of God enjoyed by those who are in Heaven, imparting supreme happiness or blessedness.

"How great will your glory and happiness be, to be allowed to see God, to be honored with sharing the joy of salvation and eternal light with Christ your Lord and God... to delight in the joy of immortality in the Kingdom of heaven with the righteous and God's friends" ~ St. Cyprian