Psalms 18:10

He rode upon a cherub, and did fly— i.e. As it is immediately explained, Yea, he did fly upon the wings of the wind. God was in the storm, and, by the ministry of angels, guided the course of it, and drove it on with such an impetuous force, as nothing could withstand. He rides in the whirlwind, and directs the storm." Angels are, in a peculiar sense, the attendants and messengers of the Almighty, whom he employs as his ministers in effecting many of those great events which take place in the administration of his providence; and particularly such as manifest his immediate interposition in the extraordinary judgments which he inflicts for the punishment of sinful nations. See Psalms 103:20; Psalms 104:4. The cherub is particularly mentioned as an emblem of the Divine Presence, and especially as employed in supporting and conveying the chariot of the Almighty, when he is represented as riding in his majesty through the firmament of heaven:

——Forth rush'd, with whirlwind sound, The chariot of paternal Deity; Flashing thick flames, wheel within wheel undrawn, Itself instinct with spirit, but convoy'd By four cherubic shapes.
Paradise Lost, b. 6:
This seems to be the image intended to be conveyed to us in the place before us: He rode upon a cherub, and flew upon the wings of the wind; i.e. The cherub supported, and led on the tempest, in which the Almighty rode, as in his chariot. This is agreeable to the office elsewhere ascribed to the cherubim. Thus they supported the mercy-seat, which was peculiarly the throne of God under the Jewish economy. What confirms me in this sentiment is, that God is expressly said to make the clouds his chariot, Psalms 104:3 and to ride upon a swift cloud, Isaiah 19:1.; so that riding upon a cherub, and riding a swift cloud, is riding in the cloud, as his chariot, supported and guided by the ministry of the cherubim. The next clause in the parallel place of Samuel is, And he was seen upon the wings of the wind. The word rendered was seen, might be translated, appeared as a warrior, or fought upon the wings of the wind; which conveys a noble representation of God, as riding in his chariot directed by cherubs, and borne up by the swift wings of a tempest, as a mighty warrior going to engage in battle for the assistance of his favourite king: in which view the passage is more striking than in the Psalms; where, however, we should observe, that, though we use the word fly in both clauses, yet the original words are different; and the verse might be rendered, He rode upon a cherub, and flew; yea, as an eagle he rapidly flew upon the wings of the wind; the latter expression conveying a stronger image than the former. See Exodus 19:4. Deuteronomy 32:11 and Chandler.