Thomas Aquinas,
Summa Theologiae — Question 84 - OF THE AGILITY OF THE BODIES OF THE BLESSED…
“ On the part of matter we find no resistance, neither of a force inclining to a contrary movement nor of a contrary place, since place is not due to matter except in so far as the latter, being circumscribed by its dimensions, is perfected by its natural form. Hence there can be no resistance save on the part of the medium, and this resistance is connatural to their movement. ”
