请问破择号在这里做什么讲

Mental health is the seed that contains self-esteem—confidence in ourselves and an ability to trust in our common sense. It allows us to have perspective on our lives—the ability to ‚not take ourselves too seriously, to laugh at ourselves, to see the bigger picture, and to see that things will work out.

健康的心理是包蕴自尊——自信和相信常识的能力——的种子。它让我们对生活拥有洞察力：一种不妄自尊大，敢于自嘲，有大局观和知道船到桥头自然直的能力。

各位老师好，这是网上看的一段英文。请问：

1、破折号在这里做什么讲？

2、not‚前面不需要助动词吗？