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

Arrive at knowledge over small streamlets, and do not plunge immediately into the ocean, since progress must go from the easier to the more difficult.

Wonder is the desire of knowledge.

For those with faith, no evidence is necessary; for those without it, no evidence will suffice.

Humility is the mark of a genuine disciple.

Faith has to do with things that are not seen and hope with things that are not at hand.

Three things are necessary for the salvation of man: to know what he ought to believe; to know what he ought to desire; and to know what he ought to do.