1905  We are in the habit of exaggerating or imagining or anticipating sorrow. We are torn by things present or about things yet to come. Consider whether your proofs of future troubles are sure. For it is more often the case that we are troubled by our apprehensions.

1825  “Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.”

1523  We don't receive wisdom, we must discover it for ourselves after a journey that no one can take for us or spare us.

1764  An error can never become true however many times you repeat it. The truth can never be wrong, even if no one hears it.

1280  I am sure the grapes are sour.