for His own sake, for my sake

"one may adhere to a thing in two ways: first, for its own sake; second, because something else is attained thereby. Accordingly charity makes us adhere to God for His own sake, uniting our minds [(mentem hominis, the mind of a man)] to God by the emotion of love [(affectum amoris)]. On the other hand, hope and faith make man adhere to God as to a principle wherefrom certain things accrue to us. Now we derive from God both knowledge of truth and the attainment of perfect goodness. Accordingly faith makes us adhere to God, as the source whence we derive the knowledge of truth, since we believe that what God tells us is true: while hope makes us adhere to God, as the source whence we derive perfect goodness, i.e., insofar as, by hope, we trust to the Divine assistance for obtaining [eternal] happiness" or "eternal life, which consists in the enjoyment of God Himself", plus the "other things . . . for which we pray God, . . . secondarily and as referred to eternal happiness."

     St. Thomas Aquinas, Summa theologiae II-II.17.6.Resp., as supplemented at the end by 17.2.Resp. & ad 1, trans. FEDP as modified (?) by the Aquinas Institute, italics mine.