The soul is the spiritual and immortal part of man, which thinks and reasons, has a power of reflection and prospect, which actuates the body now, and will shortly act in a separation from the body.  Our souls are our own not in respect of dominion and property (for we are not our own, all souls are mine, says God), but in respect of nearness and concern; our souls are our own, for they are ourselves. 

(Henry, M. (1994) Matthew Henry's commentary on the whole Bible: complete and unabridged in one volume (p. 1699). Peabody: Hendrickson.)