'To ride upon the clouds,' as in Isaiah 19:1, signifies being in the wisdom of the Word.

'To ride upon the Word of truth and of meekness of righteousness' in Psalm 45:1, 5 is teaching the doctrine of truth and goodness.

'To ride upon a cherub,' as in Psalm 18:9, 10, denotes the Lord's providence preventing a person from entering the mysteries of faith contained in the Word.

'To ride' signifies being elevated regarding the intellectual part of the mind.

(Referencat: Arcana Coelestia 3190)