Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity. - Leonardo da Vinci

Men will seem to see new destructions in the sky. The flames that fall from it will seem to rise in it and to fly from it with terror. They will hear every kind of animals speak in human language. They will instantaneously run in person in various parts of the world, without motion. They will see the greatest splendour in the midst of darkness. O! marvel of the human race! What madness has led you thus! You will speak with animals of every species and they with you in human speech. You will see yourself fall from great heights without any harm and torrents will accompany you, and will mingle with their rapid course.

May it please our great Author that I may demonstrate the nature of man and his customs, in the way I describe his figure.

People of accomplishment rarely sat back and let things happen to them. They went out and made things happen.