William James on facts

Be not afraid of life. Believe that life is worth living, and your belief will help create the fact.

The union of the mathematician with the poet, fervor with measure, passion with correctness, this surely is the ideal.

It is only by risking our persons from one hour to another that we live at all. And often enough our faith beforehand in an uncertified result is the only thing that makes the result come true.

Everyone is entitled to his own opinion, but not his own facts.

Daniel Patrick Moynihan1927–2003Often credited to Unattributed

The main part of intellectual education is not the acquisition of facts but learning how to make facts live.

Oliver Wendell Holmes Jr.1841–1935

• Education

If the facts don’t fit the theory, change the facts.