In the context of Revelation, we know that the “heaven” or “happiness” in which we will find ourselves is neither an abstraction nor a physical place in the clouds, but a living, personal relationship with the Holy Trinity. It is our meeting with the Father which takes place in the risen Christ through the communion of the Holy Spirit.
It is always necessary to maintain a certain restraint in describing these “ultimate realities” since their depiction is always unsatisfactory. Today, personalist language is better suited to describing the state of happiness and peace we will enjoy in our definitive communion with God.
The Catechism of the Catholic Church sums up the Church’s teaching on this truth: “By his death and Resurrection, Jesus Christ has ‘opened’ heaven to us. The life of the blessed consists in the full and perfect possession of the fruits of the redemption accomplished by Christ. He makes partners in his heavenly glorification those who have believed in him and remained faithful to his will. Heaven is the blessed community of all who are perfectly incorporated into Christ.”