Albert Barnes' Notes on the Whole Bible - Psalms 138:3
In the day when I cried - Referring to some former period of his life when he was in trouble.Thou answeredst me - In the very day when I called, thou gavest me the answer: that is, immediately.And strengthenedst me with strength in my soul - literally, “Thou didst embolden - or, didst make me courageous with strength.” Thou didst enable me to meet danger, and to overcome fear. It would seem probable that this was on some occasion when he was in danger from his enemies. read more
The Pulpit Commentary - Psalms 138:3
The provision of inward strength. "And strengthenedst me with strength in my soul." Whether this precisely renders the thought of the psalmist may be doubtful. It certainly presents a suggestive thought to us. The statement is certainly true of God's ways with us. His best blessings come to the inward, spiritual self—to the true individuality, the real us . The various rendering is, "Thou madest me proud;" the Revised Version gives, "Thou didst encourage me with strength in my soul;"... read more