Charles H. Spurgeon on Psalms 135:7

He maketh lightnings for the rain. It is a great instance of the divine wisdom and goodness, that lightning should be accompanied by rain, to soften its rage, and prevent its mischievous effects. Thus, in the midst of judgment, does God remember mercy. The threatenings in his word against sinners are like lightning; they would blast and scorch us up, were it not for his promises made in the same word to penitents, which, as a gracious rain, turn aside their fury, refreshing and comforting our frightened spirits. —George Horne.