There was a law in Connecticut - I believe it is still formally unrepealed - making it illegal for a man to kiss his wife on Sunday.

Is there any knowledge in the world which is so certain that no reasonable man could doubt it?

Do not feel certain of anything.

These illustrations suggest four general maxims[...]. The first is: remember that your motives are not always as altruistic as they seem to yourself. The second is: don't over-estimate your own merits. The third is: don't expect others to take as much interest in you as you do yourself. And the fourth is: don't imagine that most people give enough thought to you to have any special desire to persecute you.

Suppose atomic bombs had reduced the population of the world to one brother and sister; should they let the human race die out?

Belief in a Divine mission is one of the many forms of certainty that have afflicted the human race.

As for earthquakes, though they were still formidable, they were so interesting that men of science could hardly regret them.