Reading, solitude, idleness, a soft and sedentary life, intercourse with women and young people, these are perilous paths for a young man, and these lead him constantly into danger.

Money is the seed of money, and the first guinea is sometimes more difficult to acquire than the second million.

The abuse of books kills science. Believing that we know what we have read, we believe that we can dispense with learning it.

From the first moment of life, men ought to begin learning to deserve to live; and, as at the instant of birth we partake of the rights of citizenship, that instant ought to be the beginning of the exercise of our duty.

Nothing is less in our power than the heart, and far from commanding we are forced to obey it.

We should not teach children the sciences; but give them a taste for them.

I don't know what is truth,but I can tell you how to find it!