The world holds two classes of men: intelligent men without religion, and religious men without intelligence.

Good men's actions are natural
While a scoundrel's charity
Is carefully planned to please.

Some people are like an open grave:
You give it the thing you love most
And then get nothing in return.

It is now quite lawful for a Catholic woman to avoid pregnancy by a resort to mathematics, though she is still forbidden to resort to physics or chemistry.

For men become civilized, not in proportion to their willingness to believe, but in proportion to their readiness to doubt.

The most costly of all follies is to believe passionately in the palpably not true. It is the chief occupation of mankind.