There are many occasions when the muscles that form the lips of the mouth move the lateral muscles that are joined to them, and there are an equal number of occasions when these lateral muscles move the lips of this mouth, replacing it where it cannot return of itself, because the function of muscle is to pull and not to push except in the case of the genitals and the tongue.
Leonardo da VinciThose who, in debate, appeal to their qualifications, argue from memory, not from understanding.
Leonardo da VinciNothing will be left, Nothing in the air, nothing under the earth, nothing in the waters. All will be exterminated.
Leonardo da VinciArt is the queen of all sciences communicating knowledge to all the generations of the world.
Leonardo da Vinci