human
and much else, so soon as Work fitly begins. Knowledge? The knowledge that will hold good in working, cleave thou to that; for Nature herself accredits that, says Yea to that. Properly thou hast no other knowledge but what thou hast got by working: the rest is yet all a hypothesis of knowledge; a thing to be argued of in schools, a thing floating in the clouds, in endless logic-vortices, till we try it and fix it.
gpt
Doubt, of whatever kind, can be ended by Action alone.