Joseph Priestley

In completing one discovery we never fail to get an imperfect knowledge of others of which we could have no idea before, so that we cannot solve one doubt without creating several new ones.

To me there is in happiness an element of self-forgetfulness. You lose yourself in something outside yourself when you are happy; just as when you are desperately miserable you are intensely conscious of yourself, are a solid little lump of ego weighing a ton.

Every man, when he comes to be sensible of his natural rights, and to feel his own importance, will consider himself as fully equal to any other person whatever