We are too weak to discover the truth by reason alone

Quid est ergo tempus? Si nemo ex me quaerat, scio; si quaerenti explicare velim, nescio. What, then, is time? I know well enough what it is, provided that nobodyasksme; but if Iamasked what it is and try to explain, I am baffled.

The wicked exist in this world either to be converted or that through them the good may exercise patience.

I found thee not, O Lord, without, because I erred in seeking thee without that wert within.

If we did not have rational souls, we would not be able to believe.

Dilige et quod vis fac. (Love and then what you will, do.)

To wisdom belongs the intellectual apprehension of eternal things; to knowledge, the rational knowledge of temporal things.