What is fair in men, passes away, but not so in art

Man has much power of discourse which for the most part is vain and false; animals have but little, but it is useful and true, and a small truth is better than a great lie.

If you find from your own experience that something is a fact and it contradicts what some authority has written down, then you must abandon the authority and base your reasoning on your own findings.

Truly man is the king of beasts, for his brutality exceeds them. We live by the death of others. We are burial places.

The worst evil which can befall the artist is that his work should appear good in his own eyes.

He is a poor pupil who does not go beyond his master.

He who does not punish evil, commands it to be done.

We must doubt the certainty of everything which passes through the senses, but how much more ought we to doubt things contrary to the senses, such as the existence of God and the soul.

Those who, in debate, appeal to their qualifications, argue from memory, not from understanding.

Experience does not err; only your judgments err by expecting from her what is not in her power.

The human bird shall take his first flight,filling the words with amazement,all writings with his fame,and bringing eternal glory to those whose nest whence he sprang.

It is an acknowledged fact that we perceive errors in the work of others more readily than in our own.

Whatever you do in life, if you want to be creative and intelligent, and develop your brain, you must do everything with the awareness that everything, in some way, connects to everything else. Leonardo da Vinci