"When we have spread on earth the fruits of our nature and our enterprise . . . According to the command of the Lord and in his Spirit, we will find them once again, cleansed this time from the stain of sin, illuminated and transfigured, when Christ presents to his Father an eternal and universal kingdom." God will then be "all in all" in eternal life:
True and subsistent life consists in this: the Father, through the Son and in the Holy Spirit, pouring out his heavenly gifts on all things without exception. Thanks to his mercy, we too, men that we are, have received the inalienable promise of eternal life.
Source: Catechism of the Catholic Church (Vatican.va)