Ask yourself always: how can this be done better?

Some people feel with their heads and think with their hearts.

Doubt everything at least once, even the sentence "Two times two is four."

Do not say hypothesis, and even less theory: say way of thinking.

In every man there is something of all men.

Marriage, in contrast to the flu, starts with a fever and ends with the chills.

Doubt must be no more than vigilance, otherwise it can become dangerous.