From YOUCAT, fact 158:
158: What is heaven?
“Heaven is the endless moment of love. Nothing more separates us from God, whom our soul loves and has sought our whole life long. Together with all the angels and saints we will be able to rejoice forever in and with God.” [1023-1026, 1053]
If you have ever observed a couple looking at each other lovingly or seen a baby nursing who looks for his mother’s eyes as though it wanted to store up every smile forever, then you have some inkling of heaven. To be able to see God face to face – that is like one, single, never-ending moment of love.