译文：事前不研讨，遇变难以应对;军队不训练，作战难以取胜。强调未雨绸缪的重要性。

The essence of life is statistical improbability on a colossal scale.

The meaning of earthly existence lies not, as we have grown used to thinking, in prospering but in the development of the soul.

实现明天的唯一限制将是我们今天的疑虑。