The existence of a prime mover- nothing can move itself; there must be a first mover. The first mover is called God.

To disparage the dictate of reason is equivalent to contemning the command of God.

The greatest kindness one can render to any man consists in leading him from error to truth.

The human mind may perceive truth only through thinking, as is clear from Augustine.

Because we cannot know what God is, but only what He is not, we cannot consider how He is but only how He is not.

Man should not consider his material possession his own, but as common to all, so as to share them without hesitation when others are in need.

Rarely affirm, seldom deny, always distinguish.