Those that know, do. Those that understand, teach.
The aim of the wise is not to secure pleasure, but to avoid pain.
The proof that you know something is that you are able to teach it.
Man is a goal-seeking animal. His life only has meaning if he is reaching out and striving for his goals.
Every art and every inquiry, and similarly every action and choice, is thought to aim at some good; and for this reason the good has rightly been declared to be that at which all things aim.
All men by nature desire knowledge.
The aim of art is to represent not the outward appearance of things, but their inward significance.
All human beings, by nature, desire to know.
The one exclusive sign of thorough knowledge is the power of teaching.
To attain any assured knowledge about the soul is one of the most difficult things in the world.
Get your knowledge quickly and then use it. If you can use it you will retain it.
Knowledge shrinks as wisdom grows.
Not ignorance, but ignorance of ignorance is the death of knowledge.
In formal logic, a contradiction is the signal of a defeat; but in the evolution of real knowledge it marks the first step in progress towards a victory.
Fools act on imagination without knowledge, pedants act on knowledge without imagination.
It’s possible to satisfy the needs of the inner life by an intimate communion with nature, or by knowledge of the past.
It is always more difficult to fight against faith than against knowledge.
And I can fight only for something that I love, love only what I respect, and respect only what I at least know.
Aim for size, symmetry, shape, and condition. Looking just “big” is overrated.
Knowledge is the life of the mind.