Actions are right in proportion as they tend to promote happiness; wrong as they tend to produce the reverse of happiness. By happiness is intended pleasure and the absence of pain.

Persons of genius, it is true, are, and are always likely to be, a small minority; but in order to have them, it is necessary to preserve the soil in which they grow.

Originality is the one thing which unoriginal minds cannot feel the use of.

A [psychological] difficulty is not an impossibility.

In the long-run, the best proof of a good character is good actions.

The perpetual obstacle to human advancement is custom.

There is the greatest difference between presuming an opinion to be true, because, with every opportunity for contesting it, it has not been refuted, and assuming its truth for the purpose of not permitting its refutation.