To be beneficent when we can is a duty; and besides this, there are many minds so sympathetically constituted that, without any other motive of vanity or self-interest, they find a pleasure in spreading joy around them, and can take delight in the satisfaction of others so far as it is their own work. But I maintain that in such a case an action of this kind, however proper, however amiable it may be, has nevertheless no true moral worth, but is on a level with other inclinations. . . . For the maxim lacks the moral import, namely, that such actions be done from duty, not from inclination.

I am an investigator by inclination. I feel a great thirst for knowledge.

Thrift is care and scruple in the spending of one's means. It is not a virtue and it requires neither skill nor talent.

Procrastination is hardly more evil than grasping impatience.

Man must be disciplined, for he is by nature raw and wild.

The death of dogma is the birth of morality.

Thinking in pictures precedes thinking in words.