“The definition of an optimist. People not with a hopeful view of the future, but rather, people who simply believe that any problem that does not contradict the laws of physics can ultimately be solved.” David Deutsch

“The human mind seeks explanations; and now that we know how to find them, we are not going to stop voluntarily.” David Deutsch

“No man ever steps in the same river twice, for it is not the same river and he is not the same man.” David Deutsch