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.

Man, considered not merely as an organized being, but as a rational agent and a member of society, is perhaps the most wonderfully contrived, and to us the most interesting specimen of Divine wisdom that we have any knowledge of.

An instinct is a blind tendency to some mode of action, independent of any consideration, on the part of the agent, of the end to which the action leads.

Falsehood, like poison, will generally be rejected when administered alone; but when blended with wholesome ingredients may be swallowed unperceived.

Some persons resemble certain trees, such as the nut, which flowers in February and ripens its fruit in September; or the juniper and the arbutus; which take a whole year or more to perfect their fruit; and others, the cherry, which takes between two an three months.

Never argue at the dinner table, for the one who is not hungry gets the best of the argument.

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.