Arnold Schwarzenegger. (2023, December 23). Wikiquote. Retrieved April 18, 2024 from https://en.wikiquote.org/w/index.php?title=Arnold_Schwarzenegger&oldid=3427192.
For he truly engages in battle who endeavours to surmount all the difficulties and errors which prevent him from reaching the knowledge of truth, and he is overcome in fight who admits a false opinion touching a matter of any generality and importance, and he requires thereafter much more skill to recover his former position than to make great advances when once in possession of thoroughly ascertained principles.