It is good for me to be united to God. (Psalm 73:28)
Among philosophers it is a question, what is that end and good to the attainment of which all our duties are to have a relation? The Psalmist did not say, It is good for me to have great wealth, or to wear imperial insignia, purple, sceptre, and diadem; or, as some even of the philosophers have not blushed to say, It is good for me to enjoy sensual pleasure; or, as the better men among them seemed to say, My good is my spiritual strength; but, “It is good for me to be united to God.” This he had learned from Him whom the holy angels, with the accompanying witness of miracles, presented as the sole object of worship. And hence he himself became the sacrifice of God, whose spiritual love inflamed him, and into whose ineffable and incorporeal embrace he yearned to cast himself.
-Augustine, City of God x.18