Leonardo da Vinci Quotes.

Life well spent is long.
Our body is dependant on Heaven and Heaven on the Spirit.
He who is fixed to a star does not change his mind.
I have always felt it is my destiny to build a machine that would allow man to fly.
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.
You can have no dominion greater or less than that over yourself.

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.
As a well-spent day brings happy sleep, so a life well spent brings happy death.
I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do.
Be a mirror, absorb everything around you and still remain the same
There is no object so large but that at a great distance from the eye it does not appear smaller than a smaller object near.
Beyond a doubt truth bears the same relation to falsehood as light to darkness.

Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity.
Necessity is the mistress and guide of nature. Necessity is the theme and inventress of nature, her curb and her eternal law.