Happy is the soul that longs for the food of righteousness and thirsts for this kind of drink; it would not seek such things if it had not already savored their delight. When the soul hears the voice of the Spirit saying to it through the prophet: Taste and see that the Lord is good, it has already received a portion of God’s goodness, and is on fire with love, the love that gives joy of the utmost purity. It counts as nothing all that belongs to time; it is entirely consumed with desire to eat and drink the food of righteousness. The soul lays hold of the true meaning of the first and great commandment: You shall love the Lord God with your whole heart, and your whole mind and your whole strength, for to love God is nothing else than to love righteousness.
From a sermon on the beatitudes by Saint Leo the Great, pope