Imagine that you are in full union with God, who is Love. I have no question that you'll actually feel that besides him, there is truly nothing you will want.
As I was in prayer after Mass, alone in the chapel, I acutely sensed the perfection of Jesus the Lord. The more I sensed it, the more I was drawn into him, and the more I was overwhelmed. I was moved to tears when I sensed the depth of this perfection. I now understand why contemplation of the Lord can lead one into ecstasy.