St. Bernard of Clairvaux
St. Bernard of Clairvaux, a Medieval Mystic, upon the request of a Cardinal of
Rome, wrote a short treatise describing the four levels of love for God that one
should strive toward.
"Admit that God deserves to be loved very much, yea, boundlessly, because He
loved us first, He infinite and we nothing, loved us, miserable sinners, with a
love so great and so free. This is why I said at the beginning that the measure
of our love to God is to love immeasurably. For since our love is toward God,
who is infinite and immeasurable, how can we bound or limit the love we owe
Him? Besides, our love is not a gift but a debt. And since it is the Godhead who
loves us, Himself boundless, eternal, supreme love, of whose greatness there is
no end, yea, and His wisdom is infinite, whose peace passeth all understanding,
since it is He who loves us, I say, can we think of repaying Him grudgingly?"
from Chapter VI, On Loving God: A Brief Summary, p.12