When you're finished changing, you're finished.

Tell me and I forget. 

Teach me and I remember. 

Involve me and I learn.

Life's tragedy is that we get old too soon and wise too late.

Where sense is wanting, 

everything is wanting.

A good conscience is a continual Christmas.

As we must account for every idle word, 

so must we account for every idle silence.

An investment in knowledge pays the best interest.

Without freedom of thought, 

there can be no such thing as wisdom — 

and no such thing as public liberty 

without freedom of speech.

They who can give up essential liberty 

to obtain a little temporary safety 

deserve neither liberty nor safety.

If you would be loved, 

love, 

and be loveable.

The doorstep to the temple of wisdom 

is a knowledge of our own ignorance.