It is a good plan, with a young person of a character to be much affected by ludicrous and absurd representations, to show him plainly by examples that there is nothing which may not be thus represented. He will hardly need to be told that everything is not a mere joke.

The word of knowledge, strictly employed, implies three things: truth, proof, and conviction.

Falsehood, like the dry-rot, flourishes the more in proportion as air and light are excluded.

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.

As one may bring himself to believe almost anything he is inclined to believe, it makes all the difference whether we begin or end with the inquiry, 'What is truth?'

Vices and frailties correct each other, like acids and alkalies. If each vicious man had but one vice, I do not know how the world could go on.

Trust, therefore, for the overcoming of a difficulty, not to long-continued study after you have once become bewildered, but to repeated trials at intervals.