It is a great thing, no doubt, to have the right faith and possess sound doctrine; and sobriety, meekness, and purity are virtues that deserve high praise; but all these virtues remain vain if they are not coupled with charity. And we ought not to say that an excellent conduct is fruitful if it does not issue from love.
Let believers then examine their own state of mind and carefully scrutinize the intimate sentiments of their hearts. If they find some fruit of charity in their conscious self, let them have no doubt that God is in them. And that they may become more and more able to welcome so great a guest, let them persevere and grow in mercy which expresses itself in acts. If God is love, charity ought not to know any limits, for nothing that is limited can contain the divinity.
-- St. Leo the Great (today being his feast day), from Sermon 48
Collect for St. Leo’s day:
O Lord our God, grant that your Church, following the teaching of your servant Leo of Rome, may hold fast the great mystery of our redemption, and adore the one Christ, true God and true Man, neither divided from our human nature nor separate from your divine Being; through Jesus Christ our Lord, who lives and reigns with you and the Holy Spirit, one God, now and for ever. Amen.