Adam Clarke on Psalms 102:25

Of old hast thou laid the foundation - None taught of God ever imagined the world to have been eternal. Of old, לפנים lephanim, before there were any faces or appearances, thou didst lay the foundations of the earth. It was created by thee; it did not grow by accretion or aggregation from a pre-existent nucleus. There was nothing; and thou didst produce being - substance or matter. Out of that created matter thou didst make the earth and the heavens.