St. Paul tells us that we are temples of God, and God dwells in us. This is true only of those who are in God's Church and also are in the state of sanctifying grace. All the rest are out of the ballpark. In the parable of the man at the wedding feast without the wedding garment we observe two things. This man was in body in the religious community, but he was without the wedding garment, which is the supernatural gift of sanctifying grace.
Weeping shows that there is heat in hell, and gnashing of teeth shows that there is cold in hell.
All that misery is outside of the banquet hall. Consider God in Himself. He cannot love with a love of friendship anything but Himself. For as creatures we must be divinized by the gift of sanctifying grace, and with the help of actual grace, we must do works that have a divine quality. Then and only then can God love us within Himself.