So the faithful should look into themselves and carefully examine their minds and the impulses of their hearts. If they find some of the fruits of love stored in their hearts then they must not doubt God’s presence within them, but to make themselves more and more able to receive so great a guest they should do more and more works of durable mercy and kindness. After all, if God is love, charity should know no limit, for God himself cannot be confined within limits.
–Saint Leo the Great (c. 400-461)