Leonardo Da Vinci said this quote

A painter should begin every canvas with a wash of black, because all things in nature are dark except where exposed by the light.

~ Leonardo Da Vinci

Once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return.

~ Leonardo Da Vinci

All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

~ Leonardo Da Vinci

They will say that I, having no literary skill, cannot properly express that which I desire to treat of, but they do not know that my subjects are to be dealt with by experience rather than by words. And [experience] has been the mistress of those who wrote well. And so, as mistress, I will cite her in all cases. Though I may not, like them, be able to quote other authors, I shall rely on that which is much greater and more worthy: on experience, the mistress of their masters.

~ Leonardo Da Vinci