If all our wishes were gratified, most of our pleasures would be destroyed.

Sophistry, like poison, is at once detected and nauseated, when presented to us in a concentrated form; but a fallacy which, when stated barely in a few sentences, would not deceive a child, may deceive half the world, if diluted in a quarto volume.

Unless people can be kept in the dark, it is best for those who love the truth to give them the full light.

Everyone wishes to have truth on his side, but not everyone wishes to be on the side of truth.

It is an awful, an appalling thought, that we may be, this moment and every moment, in the presence of malignant spirits.

All gaming, since it implies a desire to profit at the expense of another, involves a breach of the tenth commandment.

As an exercise of the reasoning faculties, pure mathematics is an admirable exercise, because it consists of reasoning alone and does not encumber the student with any exercise of judgment.