Be careful never to retire to rest in a room not properly ventilated.

Both poetry and philosophy are prodigal of eulogy over the mind which ransoms itself by its own energy from a captivity to custom, which breaks the common bounds of empire, and cuts a Simplon over mountains of difficulty for its own purposes, whether of good or of evil.

There is a deeper pleasure in following truth to the scaffold or the cross, than in joining the multitudinous retinue, and mingling our shouts with theirs, when victorious error celebrates its triumphs.

Every addition to true knowledge is an addition to human power.

Let but the public mind become once thoroughly corrupt, and all attempts to secure property, liberty or life, by mere force of laws written on parchment, will be as vain as to put up printed notices in an orchard to keep off the canker-worms.

One thing I certainly never was made for, and that is to put principles on and off at the dictation of a party, as a lackey changes his livery at his master's command.

The experience of the ages that are past, the hopes of the ages that are yet to come, unite their voices in an appeal to us;– they implore us to think more of the character of our people than of its numbers; to look upon our vast natural resources, not as tempters to ostentation and pride, but as means to be converted by the refining alchemy of education into mental and spiritual treasures; ...and thus give to the world the example of a nation whose wisdom increases with its prosperity, and whose virtues are equal to its power.