When you draw a nude, sketch the whole figure and nicely fit the members to it and to each other. Even though you may only finish one portion of the drawing, just make certain that all the parts hang together, so that the study will be useful to you in the future.
Leonardo da VinciThose who condemn the supreme certainty of mathematics feed on confusion, and can never silence the contradictions of the sophistical sciences which lead to eternal quackery.
Leonardo da VinciThe part always has a tendency to reunite with its whole in order to escape from its imperfection.
Leonardo da VinciOne day the world will look upon research upon animals as it now looks upon research on human beings.
Leonardo da Vinci