The existence of a God is the basis of all religion. Few appear to doubt his existence; yet this fundamental article utterly embarrasses every mind that reasons. The first question of every catechism has been, and ever will be, the most difficult to resolve. (In the year 1701, the holy fathers of the oratory of Vendome maintained in a thesis, this proposition—that, according to St. Thomas, the existence of God is not, and cannot be, a subject of faith.)