John Wesley on Psalms 68:33

Heavens - The highest heavens; dwelling there in infinite glory, and from thence looking down upon all the inhabitants of the earth, and ruling them by his almighty power. Of old - From the beginning of the world; whereas the ark was only some hundred years old. A voice - His gospel, published by Christ and his apostles, assisted by the Holy Spirit sent from heaven; which might well be called God's voice, and that a mighty voice, because it produced such great and wonderful effects.