The only limit to our realization of tomorrow will be our doubts of today.
实现明天的唯一限制将是我们今天的疑虑。
真正的道路是沿着一条绳子,它不是悬在高处,而是紧贴地面。它似乎更多是为了让人绊倒,而不是让人行走。
The real challenge is not just to feed the world, but to nourish it in a sustainable way.