You'll never know unless you try.

如果不试你永远也不会知道。

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But you'll never know unless you try.

但如果不试你永远不知道。

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Unless you try, you will never succeed.

假如你不尝试，你就不会成功。

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You will never know what can work better unless you try different things out.

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"You'll never know unless you try, " was his response.

CNN: STORY HIGHLIGHTS

Emerson, the great champion of individualism, was a big proponent of experimentation and change: "Unless you try to do something beyond what you have already mastered, you will never grow, " he said.

WSJ: Think While You Drink: In Defense of Wine Snobs | On Wine by Lettie Teague