John Wesley on Psalms 104:30

Spirit - That quickening power of God, by which he produces life in the creatures from time to time. For he speaks not here of the first creation, but of the continued production of living creatures. Created - Other living creatures are produced; the word created being taken in its largest sense for the production of things by second causes. Renewest - And thus by thy wise and wonderful providence thou preservest the succession of living creatures.