On the ostensible exactitude of certain branches of human knowledge, including mathematics. The exactness is a fake.

Science repudiates philosophy. In other words, it has never cared to justify its truth or explain its meaning.

The defense of morals is the battle-cry which best rallies stupidity against change.

Every organism requires an environment of friends, partly to shield it from violent changes, and partly to supply it with its wants.

Without deductive logic science would be entirely useless. It is merely a barren game to ascend from the particular to the general, unless afterwards we can reverse the process and descend from the general to the particular, ascending and descending like angels on Jacob's ladder.

In every age of well-marked transition, there is the pattern of habitual dumb practice and emotion which is passing and there is oncoming a new complex of habit.

From the moment of birth we are immersed in action, and can only fitfully guide it by taking thought.