Why are you cast down, O my soul? and why are you disturbed within me? hope in God: for I shall yet praise him, who is the health of my countenance, and my God.
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Augustine of Hippo
AD 430
6. And again, in order that he may draw the sound from that sounding-board below, he addresses his soul: he says, "Why art thou sorrowful, O my soul, and why dost thou disquiet me?" (ver. 5). I am in tribulations, in weariness, in mourning, "Why dost thou disquiet me, O my soul?" Who is the speaker, to whom is he speaking? That it is the soul to which he is speaking, everybody knows: for it is obvious: the appeal is addressed to it directly: "Why art thou sorrowful, O my soul, and why dost thou disquiet me?" The question is as to the speaker. It is not the flesh addressing the soul, surely, since the flesh cannot speak without the soul. For it is more appropriate for the soul to address the flesh, than for the flesh to address the soul. ...We perceive then that we have a certain part, in which is "the image of God;" viz. the mind and reason. It was that same mind that prayed for "God's Light" and "God's Truth." It is the same mind by which we apprehend right and wrong: it is by the sam...
My God. This word is singular; but the former "Elohim "is plural, to intimate one God in three persons. (Worthington)
Harp. Hebrew cinnor, which Symmachus renders, "the psaltery. "The sons of Core were chiefly door-keepers: but they also played on musical instruments. (Calmet)