“There are three classes of people: those who see. Those who see when they are shown. Those who do not see.”

“A well-spent day brings happy sleep”

“Where the spirit does not work with the hand there is no art”

“Time stays long enough for anyone who will use it.”

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

“You can have no dominion greater or less than that over yourself.”

“Iron rusts from disuse; water loses its purity from stagnation ... even so does inaction sap the vigour of the mind.”

“The noblest pleasure is the joy of understanding.”

"There shall be wings! If the accomplishment be not for me, 'tis for some other.”

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

“The depth and strength of a human character are defined by its moral reserves. People reveal themselves completely only when they are thrown out of the customary conditions of their life, for only then do they have to fall back on their reserves.”

“As a well spent day brings happy sleep, so a life well spent brings happy death.”

“Where there is shouting, there is no true knowledge.”

“The greatest deception men suffer is from their own opinions.”

“It's easier to resist at the beginning than at the end.”

“Learning never exhausts the mind.”

“Nature never breaks her own laws.”

“He who wishes to be rich in a day will be hanged in a year.”

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

“The truth of things is the chief nutriment of superior intellects.”

“Our life is made by the death of others.”

“All our knowledge has its origins in our perceptions.”

“Blinding ignorance does mislead us. O! Wretched mortals, open your eyes!”

“Water is the driving force of all nature.”

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

“The function of muscle is to pull and not to push, except in the case of the genitals and the tongue.”

“Who sows virtue reaps honor.”

Leonardo Da Vinci