Midrash su Salmi 147:5

R. Chanina b. Papa propounded the following contradiction: "It is written (Job 37, 23) The Almighty, whom we cannot find out, is excellent in power. And again there is a passage (Ex. 15, 6) Thy right hand, O Lord, glorious in power. And again there is a passage (Ps. 147, 5) Great is our Lord, and mighty in power. This presents no difficulty: One deals with the time of judgment. [He then does not use His might]; but the other deals with the time of war [when He does use it]."

Rabbi Chalafta said, "Blessed is the name of the Holy One, blessed be He; as there is nothing like His miracles and His wonders and there is nothing like His heroic deeds and His actions, as it is stated (Psalms 147:5), 'Great is our master and of abundant power.' The Holy One, blessed be He, is holy and pure and extended His arms against the impure. Why? Because He is great and awesome. And for the sake of Israel, He let His power be known. And why for the sake of Israel? Since He said to Yakov (Genesis 46:4), 'And I will go down with you to Egypt,' and He [fights] the wars of Israel: [Only] one angel overturned Sodom, but here (Isaiah 42:13), 'The Lord will go out like a warrior; like a man of war, He will arouse His jealousy.'"