Leonardo da Vinci

"The human foot is a masterpiece of engineering and a work of art."

"Time stays long enough for anyone who will use it."

"Beyond a doubt truth bears the same relation to falsehood as light to darkness."

"He who is fixed to a star does not change his mind."

"Time abides long enough for those who make use of it."

"A beautiful body perishes, but a work of art dies not."

"Although 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."

"As a well-spent day brings happy sleep, so a life well spent brings happy death."

"Experience never errs; it is only your judgments that err by promising themselves effects such as are not caused by your experiments."

"Human subtlety will never devise an invention more beautiful, more simple or more direct than does nature because in her inventions nothing is lacking, and nothing is superfluous."

"Just as courage imperils life, fear protects it."

"Just as courage is the danger of life, so is fear its safeguard."

"Learning never exhausts the mind."

"Life well spent is long."

"Men of lofty genius sometimes accomplish the most when they work least, for their minds are occupied with their ideas and the perfection of their conceptions, to which they afterwards give form."

"Men of lofty genius when they are doing the least work are most active."

"Nature never breaks her own laws."

"Necessity is the mistress and guide of nature. Necessity is the theme and inventress of nature, her curb and her eternal law."

"Nothing strengthens authority so much as silence."

"Our life is made by the death of others."

"Poor is the pupil who does not surpass his master."

"Science is the captain, and practice the soldiers."

"Tears come from the heart and not from the brain."

"The greatest deception men suffer is from their own opinions."

"The noblest pleasure is the joy of understanding."

"Water is the driving force of all nature."

"While I thought that I was learning how to live, I have been learning how to die."

"Why does the eye see a thing more clearly in dreams than the imagination when awake?"