- Ontological arguments are arguments, for the conclusion that God exists, from premises which are supposed to derive from some source other than observation of the world—e.g., from reason alone. In other words, ontological arguments are arguments from what are typically alleged to be none but analytic, a priori and necessary premises to the conclusion that God exists.
A man who is so exceedingly civil that for the sake of quietude and a peaceable name will silently see the community imposed upon, or their rights invaded, may, in his principles, be a good man, but cannot be stiled a useful one, neither does he come up to the full mark of his duty; for silence becomes a kind of crime when it operates as a cover or an encouragement to the guilty.
Thomas Paine
stanford encyclopedia of philosophy of