Saint Bernard of Clairvaux Four Degrees of Love…
"since we are carnal and are born of the lust of the flesh, it must be that our desire and our love shall have its beginning in the flesh. But rightly guided by the grace of God through these degrees, it will have its consummation in the spirit: for that was not first which is spiritual but that which is natural; and afterward that which is spiritual (I Cor. 15.46).
1. At first, man loves himself for his own sake. That is the flesh, which can appreciate nothing beyond itself.
2. Next, he perceives that he cannot exist by himself, and so begins by faith to seek after God, and to love Him as something necessary to his own welfare. When he has learned to worship God and to seek Him aright, meditating on God, reading God's Word, praying and obeying His commandments, he comes gradually to know what God is, and finds Him altogether lovely.
3. So, having tasted and seen how gracious the Lord is (Ps. 34.8), he advances to the third degree, when he loves God, not merely as his benefactor but as God.
4. The fourth degree and perfect condition wherein man loves himself solely for God's sake. Let any who have attained so far bear record; I confess it seems beyond my powers…For then in wondrous wise he will forget himself and as if delivered from self, he will grow wholly God's. Joined unto the Lord, he will then be one spirit with Him (I Cor. 6.17)."