积极性让我们变得更好。通过打开我们的心灵和思想，积极情绪让我们能够发现和建立新的技能、新的联系、新的知识和新的存在方式。

Every lump of coal we mine keeps the lights on in someone's home.

The competitor to be feared is one who never bothers about you at all, but goes on making his own business better all the time.

未经审视的生活不值得过。

The deepest theorems often arise from the simplest observations.

The truth is not always what we want to hear.