"I am not young enough to know everything."
"What you don't know can't hurt you, but it can kill you."
释义:一年四季都有花开不败,四时八节总有绿草长青。此句描写了自然界中的花草树木,它们在四季更迭和八个气节中都能生长茂盛,不会凋零或枯萎,象征着坚韧的生命力。