Wisdom

Skepticism and intellectual criticism are the attitude of doubt which is essential to the integrity of the mind.

Every great advance in science has issued from a new audacity of imagination.

Failure is instructive. The person who really thinks learns quite as much from his failures as from his successes.

Education is not preparation for life; education is life itself.

The art of being wise is the art of knowing what to overlook.

Science is nothing but trained and organized common sense.

Every man is fully satisfied that there is such a thing as truth, or he would not ask any question.

Do not block the way of inquiry.

The opinion which is fated to be ultimately agreed to by all who investigate is what we mean by truth, and the object represented in this opinion is the real.

Every philosophy is tinged with the coloring of some secret imaginative background.

Civilization advances by extending the number of important operations which we can perform without thinking about them.

Not ignorance, but ignorance of ignorance, is the death of knowledge.

Measure twice, cut once.

Precision is the key to progress.

Invention is the mother of necessity.

There is a way of thinking about what is human as a finite possibility in contrast to what we are empirically.

When reason sets itself free in its autonomy, it constitutes itself as an ultimate value.

The world is not an obstacle on the way to God, it is the way.

All journeys have secret destinations of which the traveler is unaware.

Philosophy as science is completable, in principle at least.