"You, that are going to be married, think things can never be done too fast: but we that are old, and know what we are about, must elope methodically, madam."
"There is nothing so absurd or ridiculous that has not at some time been said by some philosopher. Fontenelle says he would undertake to persuade the whole public of readers to believe that the sun was neither the cause of light or heat, if he could only get six philosophers on his side."
"If frugality were established in the state, and if our expenses were laid out to meet needs rather than superfluities of life, there might be fewer wants, and even fewer pleasures, but infinitely more happiness."
"I was ever of the opinion, that the honest man who married and brought up a large family, did more service than he who continued single, and only talked of population."
"As writers become more numerous, it is natural for readers to become more indolent; whence must necessarily arise a desire of attaining knowledge with the greatest possible ease."
"A man who leaves home to mend himself and others is a philosopher; but he who goes from country to country, guided by the blind impulse of curiosity, is a vagabond."