When you innovate, you've got to be prepared for everyone telling you you're nuts.

The shepherd drives the wolf from the sheep’s throat, for which the sheep thanks the shepherd as his liberator, while the wolf denounces him for the same act. . . . Plainly the sheep and the wolf are not agreed upon the definition of liberty.

To every action there is always opposed an equal reaction: or, the mutual actions of two bodies upon each other are always equal, and directed to contrary parts.

Innovation is the specific instrument of entrepreneurship…the act that endows resources with a new capacity to create wealth.

Sometimes when you innovate, you make mistakes. It is best to admit them quickly, and get on with improving your other innovations.

Consider the rights of others before your own feelings, and the feelings of others before your own rights.

To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.

The growth of the mind is the widening of the range of consciousness, and . . . each step forward has been a most painful and laborious achievement.

Let us affirm what seems to be the truth, that, whether one is or is not, one and the others in relation to themselves and one another, all of them, in every way, are and are not, and appear to be and appear not to be.

It may easily come to pass that a vain man may become proud and imagine himself pleasing to all when he is in reality a universal nuisance.

You must try to observe yourself more and more objectively, to look at everything in yourself as though another person.

If most of us remain ignorant of ourselves, it is because self-knowledge is painful and we prefer the pleasures of illusion.

A problem well-put is half-solved.