Leonardo da Vinci

Leonardo di ser Piero da Vinci (15 April 1452 – 2 May 1519) Italian polymath of the High Renaissance who was active as a painter, draughtsman, engineer, scientist, theorist, sculptor, and architect.

Practice must always be founded on sound theory.
Those who accomplish don't sit around, hoping things will happen to them...
Beauty perishes in life, but is immortal in art.
A painter without a brush is like a weasel without a tongue
The instant does not have time; and time is made from the movement of the instant.
Who sows virtue reaps honour.
Tomaso of Florence, known as Masaccio, showed by his perfect works how those who took their nourishment from anything but nature, mistress of masters, were laboring in vain.
People of accomplishments rarely sit back and let things happen to them. They go out and happen to things.
Many have made a trade of delusions and false miracles, deceiving the stupid multitude. Blinding ignorance does mislead us. O! Wretched mortals, open your eyes!
Tears come from the heart and not from the brain.
For 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.
Anyone who in discussion quotes authority uses his memory rather than his intellect.
There are three classes of people: those who see. Those who see when they are shown. Those who do not see." Time stays long enough for anyone who will use it. Poor is the pupil who does not surpass his master Simplicity is the ultimate sophistication. 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.
A bird is like an instrument working according to mathematical law, and it is in the capacity of man to reproduce such an instrument.
All our knowledge has its origins in our perceptions.
Knowing is not enough; we must apply. Being willing is not enough; we must do.
While I thought that I was learning how to live, I have been learning how to die.
Men do wrong to lament the flight of time, complaining that it passes too quickly and failing to perceive that its period is sufficiently long; but a good memory, with which nature has endowed us, causes everything that is long past to appear to us to be present.
Light is the chaser away of darkness. Shade is the obstruction of light.
Anyone who supports an argument by appealing to an authority is not using their intelligence; he only uses his memory.
Since you cannot do what you wish, wish what you can do.
As a well-spent day brings a happy sleep, so a well-employed life brings a happy death.
Experience is a truer guide than the words of others.
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.
To me it seems that those sciences are vain and full of error which are not born of experience, mother of all certainty, firsthand experience which in its origins, or means, or end has passed through one of the five senses. And if we doubt the certainty of everything which passes through the senses, how much more ought we to doubt things contrary to these senses such as the existence of god or of the soul or similar things over which there is always dispute and contention.
To such an extent does nature delight and abound in variety that among her trees there is not one plant to be found which is exactly like another; and not only among the plants, but among the boughs, the leaves and the fruits, you will not find one which is exactly similar to another.
Art lives from constraints and dies from freedom.
Nature never breaks her own laws.
Painting is concerned with all the 10 attributes of sight; which are: Darkness, Light, Solidity and Colour, Form and Position, Distance and Propinquity, Motion and Rest.
I love to kiss my girl when we watch deep Netflix shows.