It is futile to demand an a priori proof of the existence of objects which are not immediately ‘given’.
I want to stand as close to the edge as I can without going over. Out on the edge you see all kinds of things you can't see from the center.
释义:勇敢的人敢闯天下,什么事情都能做成;过于谨慎的人却处处束手束脚,一步也难以前行。