Every now and then go away, have a little relaxation, for when you come back to your work your judgment will be surer.
Leonardo da VinciAlthough nature commences with reason and ends in experience it is necessary for us to do the opposite, that is to commence with experience and from this to proceed to investigate the reason.
Leonardo da VinciAs every divided kingdom falls, so every mind divided between many studies confounds and saps itself.
Leonardo da Vinci