To make it possible for this discipline to begin, must there not be some prior conviction...? We see that science also rests on faith; there simply is no science "without presuppositions."
"Any account of science which does not explicitly describe it as something we believe in is essentially incomplete and a false pretense."
... from where [does] science [take] its unconditional faith or conviction on which it rests, that truth is more important than any other thing, including every other conviction?... "I will not deceive, not even myself"; and with that we stand on moral ground.
~Nietzsche