Psalms 63:4

“Thus--literally, "Truly." will I bless--praise Thee (Psa 34:1). lift up my hands--in worship (compare Psa 28:2). in thy name--in praise of Thy perfections.”

“Thus will I bless thee while I live - In my life; or, as long as life lasts, will I praise thee. The word “thus” refers to the sentiment in the previous verse, meaning that as the result of his deep sense of the value of the loving kindness of God, he would praise him through all the remainder of his life, or would never cease to praise him. A true purpose of serving God embraces the whole of this life, and the whole of eternity. He who loves God, and who has any proper sense of his mercy, does not anticipate a time when he will cease to praise and bless him, or when he will have any desire or wish not to be engaged in his service. I will lift up my hands in thy name - In solemn prayer and…”

“Thus: Psa 104:33, Psa 145:1-3, Psa 146:1, Psa 146:2 I will lift: Psa 134:2; 1Kings 8:22-66; Hab 3:10 Psalms 63:5”

“This strophe again takes up the כּן ( Psa 63:3): thus ardently longing, for all time to come also, is he set towards God, with such fervent longing after God will he bless Him in his life, i.e., entirely filling up his life therewith (בּחיּי as in Psa 104:33; Psa 146:2; cf. Baruch 4:20, ἐν ταῖς ἡμέραις μου), and in His name, i.e., invoking it and appealing to it, will he lift up his hands in prayer. The being occupied with God makes him, even though as now in the desert he is obliged to suffer bodily hunger, satisfied and cheerful like the fattest and most marrowy food: velut adipe et pinguedine satiatur anima mea. From Lev 3:17; Lev 7:25, Grussetius and Frisch infer that spiritualies…”