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

Ideality is the avant-courier of the mind.

If any man seeks for greatness, let him forget greatness and ask for truth, and he will find both.

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.

But let a man know that there are things to be known, of which he is ignorant, and it is so much carved out of his domain of universal knowledge.

Jails and prisons are the complement of schools; so many less as you have of the latter, so many more must you have of the former.

Those who exert the first influence upon the mind have the greatest power.