每个生物都在为生存而斗争。
Every organism is in a struggle for existence.
Robots should think like humans, not humans work like robots.
译文:学习贵在实践,而非空知;贵在有用于世,而非无用之学。反对空谈,提倡经世致用。
“唯一无限的是宇宙和人类的愚蠢。”