Charles H. Spurgeon on Psalms 66:9

Which holdest our soul in life. It is truth, that all we have is in the hand of God; but God keeps our life in his hand last of all, and he hath that in his hand in a special manner. Though the soul continue, life may not continue; there is the soul when there is not life: life is that which is the union of soul and body. Thou holdest our soul in life; that is, thou holdest soul and body together. So Daniel describes God to Belshazzar, Da 5:23, "The God in whose hand thy breath is, and whose are all thy ways, hast thou not glorified." The breath of princes is in the hand of God, and the same hand holds the breath of the meanest subject. This may be matter of comfort to us in times of danger, and times of death: when the hand of man is lifted up to take thy life, remember thy life is held in the hand of God; and as God said to Satan (Job 2:6): Afflict the body of Job, but save his life; so God saith still to bloody wretches, who are as the limbs of Satan: The bodies of such and such are in your hands, the estates of such and such are in your hands, but save their lives. Joseph Caryl.