Lyric discussion by FUNKePills 

The Song's pretty obviously about being 'Nervous'. The singer is advising you, like a spectator, that if you let nervousness control you, nothing will change and you'll only ever know one thing. So you just have to be strong, keep calm, and not let nervousness control you. Stuff changes. Things go wrong. You just have to power through it and don't be nervous.

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