What matters it to me if someone does not understand this? Let him too rejoice and say, โWhat is this?โ Let him rejoice even at this, and let him love to find you while not finding it out, rather than, while finding it out, not to find you.
Saint AugustineEveryone who observes himself doubting observes a truth, and about that which he observes he is certain; therefore he is certain about a truth. Everyone therefore who doubts whether truth exists has in himself a truth on which not to doubt.... Hence one who can doubt at all ought not to doubt the existence of truth.
Saint Augustine