The profound thinker always suspects that he is superficial.

The European talks of progress because by the aid of a few scientific discoveries he has established a society which has mistaken comfort for civilisation.

You will in due season find your property is less valuable, and your freedom less complete.

As men advance in life, all passions resolve themselves into money. Love, ambition, even poetry, end in this.

Experience is the child of thought, and thought is the child of action.

I think that an author who speaks about his own books is almost as bad as a mother who talks about her own children.

We should never lose an occasion. Opportunity is more powerful even than conquerors and prophets.