He never felt lonliness except when he was happy.

You'd let the whole world perish rather than soil that immaculate self of yours with a single spot of which you'd have to be ashamed.

Those who say theory and practice are two unrelated realms are fools in one and scoundrels in the other.

Consider the reasons which make us certain that we are right, but not the fact that we are certain. If you are not convinced, ignore our certainty. Don't be tempted to substitute our judgment for your own.

The moral is the chosen, not the forced; the understood, not the obeyed. The moral is the rational, and reason accepts no commandments.

Emotions are inherent in your nature, but their content is dictated by your mind. Your emotional capacity is an empty motor, and your values are the fuel with which your mind fills it.

You have no choice about your capacity to feel that something is good for you or evil, but what you will consider good or evil, what will give you joy or pain, what you will love or hate, desire or fear, depends on your standard of value.