Why persist in walking difficult and toilsome paths? There is no repose where you are seeking it. Search as you like, it is not where you are looking. You are seeking a happy life in the realm of death, and it will not be found there. How could life be happy where there is no life at all?
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