"Predictability is not how things will go, but how they can go."

"Wisdom is intelligence in context."

"The problem with the world is that everyone does not have a brain, but everyone does have a tongue."

"Hundreds of wise men cannot make the world a heaven, but one idiot is enough to turn it into a hell."

"Since human knowledge is not perfect, a more knowledgeable person is not always right."

"It is not truth that is validated by a proof, but one’s understanding of it."

"A line of reasoning does not lead but follows us to truth."

"Imitar equivale a moverse i fatigarse en el wagón de un ferrocarril: nos imajinamos realizar mucho i no hacemos más q…"

"El hombre anda con pasos cortos en la infancia i en la vejez."

"la forma da el mérito; n'olvidemos que sólo por la forma, el carbono se llama unas veces carbón i otras veces diamante"