请问下面这段对话的意思.谢谢

“我知道您能做它， Maurice”，他说。 “但是您必须证明它对你自己。 这是一个好开始”。
I害怕了。 什么保证那里在我的头脑不会再去空白？
"那里是没有保证， “Dubois医生慢慢地说。 他然后连同我能一样清楚今天听见象三十七年前的词： “不要害怕害怕”。 我不是肯定的什么他意味，直到他解释了。
"您害怕再跨步在阶段上，因此您告诉自己您完成。 但是恐惧从未是放弃的一个原因; 它是仅借口。 一个勇敢的人遇到恐惧的When，他承认it—and尽管它继续。“

"I know you can do it, Maurice," he said. "but you must prove it to yourself. This is a good start."
I was terrified. What guarantee would there be that my mind would not go blank again?
"There are no guarantees," Doctor Dubois said slowly. And then he went on with words that I can hear as clearly today as thirty-seven years ago: "Don't be afraid to be afraid." I was not sure what he meant until he explained.
"You are afraid to step onto a stage again, so you tell yourself you're finished. But fear is never a reason for quitting; it's only an excuse.
When a brave man encounters fear, he admit it—and goes on despite it."

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