"The only substance properly so called is the soul"
"Sympathy is the first condition of criticism"
"Order is power"
"It is by teaching that we teach ourselves, by relating that we observe, by affirming that we examine, by showing that we look, by writing that we think, by pumping that we draw water into the well"
"Common sense is the measure of the possible; it is composed of experience and prevision; it is calculation applied to life"
