Exercise even when you are tired.

即使累了也要运动。

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When you are tired you become irrational.

当你疲倦的时候，你会变得没有理智。

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There is nothing better than a good rest when you are tired.

当你疲劳的时候，没有什么比好好休息一下更好的了。

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When you get tired from all that walking, there are more than nine thousand benches where you can sit down.

VOA: special.2009.10.30

Some people lack empathy permanently, others switch it off when they are tired, stressed or impatient telling a child not to bother you because you are working, for example and experience regret for their harsh words when their empathy returns.

ECONOMIST: Morality and the brain: Medical diagnosis of malfeasance | The