Pierre Gassendi, who was a Catholic priest and a close contemporary of Descartes, revived the work of Democritus and proposed an atomic theory in which matter was composed of tiny indivisible parts. Unlike Descartes, Gassendi did not attempt to describe a mechanistic universe in which all action on a fundamental level occurred by way of vortices - a theory which for many people marginalised God. Instead, he envisaged a universe composed of Democritus's atoms presided over by an all- pervading Creator. Gassendi's outlook has been dubbed 'Christianised atomism', because it maintains an omnipotent and omnipresent role for God. This was more acceptable than Descartes's model to men like Newton, who sought a mechanistic model for the universe but could not countenance any diminishing of the Creator's position.