She has a mental toughness that did not come about by chance.

她的坚韧不是偶然产生的。

In mental toughness training, we say it's all or nothing.

坚定的精神，就是最重要的。

So I leveraged the mental toughness that I built while going through prison.

所以我利用了自己在监狱中建立的坚强意志。

Resilience means developing a strong solid level of mental toughness. We aren't born with it--it's a habit you develop, a skill you learn. And it's absolutely essential.

韧性是逐步锻炼出来的强壮的心理素质。虽然这种能力不是天生的，但这是一个可以养成的习惯，一个可以学习的技能。对我们每个人来说都非常重要。

Optimism can make you healthier, happier and extend your life. The Army teaches it in order to increase mental toughness in soldiers. Being over confident improves performance.

乐观让人健康，开心，长寿。军队为使士兵精神强大坚毅也教人乐观。过度自信让人表现更好。