Vanity is illustrated in the cause and effect of love, as in the case of Cleopatra.

The best defense against logic is ignorance.

All the troubles of life come upon us because we refuse to sit quietly for a while each day in our rooms.

Faith is a sounder guide than reason. Reason can only go so far, but faith has no limits.

The Stoics say, "Retire within yourselves; it is there you will find your rest." And that is not true. Others say, "Go out of yourselves; seek happiness in amusement." And this is not true. Illness comes. Happiness is neither without us nor within us. It is in God, both without us and within us.

Man's grandeur is that he knows himself to be miserable.

All the unhappiness of men arises from one single fact, that they cannot stay quietly in their own chamber.