有一句话怎么都理解不了

If you don't have a goal (a corporate goal, a market share goal, a personal career goal, an athletic goal...) then you can just do your best. You can take what comes. You can reprioritize on a regular basis. If you don't have a goal, you never have to worry about missing it. If you don't have a goal you don't need nearly as many excuses, either.
请问，红线部分的这句话是嘛意思嘛！
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