"If you aim nothing, you will hit the bull's eye every time"
You have slightly misquoted the proverb, Peter. But you must tell us what question you are asking about anything you post. Why are you posting them in our Essay forum?
hit the bull's eye every time, means?

sorry, wrong section again. how can I move this to the proper section of "Ask a question" page?
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If you aim at nothing, you will hit the bull's eye every time.

hit the bull's eye every time = always succeed exactly and completely
"If you aim at nothing, you will hit the bull's eye every time"

Lets change the words and see if it can be more clear:

"If you have nothing planned, you will do nothing"

"If your goals are nothing, you will always reach your goal"

A bulllseye is the center of a target used for archery (bow & arrow), and here it is used to mean 'a goal that you are trying to do'.

I hope this helps! Take care friend : )