The sciences, even the best,-mathematics and astronomy,-are like sportsmen, who seize whatever prey offers, even without being able to make any use of it.

Be not the slave of your own past.

Next to the originator of a good sentence is the first quoter of it. Many will read the book before one thinks of quoting a passage. As soon as he has done this, that line will be quoted east and west.

Greatness once and forever has down with opinion.

The two terrors that discourage creativity and creative living are fear of public opinion and undue reverence for one's own consistency.

Don't make a novel to establish a principle of political economy. You will spoil both.

Real action is in silent moments.