Part of us is always the observer, and no matter what, it observes. It watches us. It does not care if we are happy or unhappy, if we are sick or well, if we live or die. Its only job is to sit there on our shoulder and pass judgment on whether we are worthwhile human beings.
If we must lose wife or husband when we live to our highest right, we lose an unhappy marriage as well, and we gain ourselves. But if a marriage is born between two already self-discovered, what a lovely adventure begins, hurricanes and all!
He who believes he knows the ending of things before they begin is either a very wise person or an idiot. Regardless, he is unhappy for he hast drove a knife into the heart of wonder.
The happiness and unhappiness of the rational, social animal depends not on what he feels but on what he does; just as his virtue and vice consist not in feeling but in doing.
Irresolution on the schemes of life which offer themselves to our choice, and inconstancy in pursuing them, are the greatest causes of all our unhappiness.