Whoever in debate quotes authority uses not intellect, but memory. — Leonardo da Vinci Copy Share Image
There are four Powers: memory and intellect, desire and covetousness. The two first are mental and the others sensual. The three senses:… — Leonardo da Vinci Copy Share Image
He who in reasoning cites authority is making use of his memory rather than of his intellect. — Leonardo da Vinci Copy Share Image
Those who, in debate, appeal to their qualifications, argue from memory, not from understanding. — Leonardo da Vinci Copy Share Image
A good memory, which nature has endowed us with, causes things long past to seem present. — Leonardo da Vinci Copy Share Image
Men wrongly lament the flight of time, blaming it for being too swift; they do not perceive that its passage is sufficiently… — Leonardo da Vinci Copy Share Image
Every loss which we incur leaves behind it vexation in the memory, save the greatest loss of all, that is, death, which… — Leonardo da Vinci Copy Share Image
Just as eating against one's will is injurious to health, so studying without a liking for it spoils the memory, and it… — Leonardo da Vinci Copy Share Image
Anyone who invokes authors in discussion is not using his intelligence but his memory. — Leonardo da Vinci Copy Share Image
Things that are separate shall be united and acquire such virtue that they will restore to man his lost memory. — Leonardo da Vinci Copy Share Image
Study without desire spoils the memory, and it retains nothing that it takes in. — Leonardo da Vinci Copy Share Image
Just as food eaten without appetite is a tedious nourishment, so does study without zeal damage the memory by not assimilating what… — Leonardo da Vinci Copy Share Image
The evil which does me no harm is like the good which in no wise avails me. — Leonardo da Vinci Copy Share Image
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 Copy Share Image
An arch consists of two weaknesses which, leaning one against the other, make a strength. — Leonardo da Vinci Copy Share Image
But to me all sciences seem vain and full of error that are not born of experience, mother of all certainty, and do not… — Leonardo da Vinci Copy Share Image
It is ordained that to the ambitious, who derive no satisfaction from the gifts of life and the beauty of the world, life shall… — Leonardo da Vinci Copy Share Image
Be a mirror, absorb everything around you and still remain the same — Leonardo da Vinci Copy Share Image
Human subtlety will never devise an invention more beautiful, more simple or more direct than does nature because in her inventions nothing is lacking,… — Leonardo da Vinci Copy Share Image
People reveal themselves completely only when they are thrown out of the customary conditions of their life. — Leonardo da Vinci Copy Share Image
