Happiness is no laughing matter.

As a science, logic institutes an analysis of the process of the mind in reasoning, and investigating the principles on which argumentation is conducted; as an art, it furnishes such rules as may be derived from those principles, for guarding against erroneous deductions.

Anger requires that the offender should not only be made to grieve in his turn, but to grieve for that particular wrong which has been done by him.

Habits are formed, not at one stroke, but gradually and insensibly; so that, unless vigilant care be employed, a great change may come over the character without our being conscious of any.

Of all hostile feelings, envy is perhaps the hardest to be subdued, because hardly any one owns it even to himself, but looks out for one pretext after another to justify his hostility.

Man is naturally more desirous of a quiet and approving, than of a vigilant and tender conscience--more desirous of security than of safety.

knowledge of our duties is the most useful part of philosophy.