我感到内心极大的空虚，好像我在一直搜寻的短暂的一瞥是来自我的内心而不是外在，结果发现什么都没有找到。

I felt a great emptiness inside, as if I had been searching for some glimpse, not outside but within myself, and had discovered that there was nothing to be found.

youdao

只有在我过度劳累的时候，在我长时间不断工作的时侯，在我感到内心空虚，需要充实的时候，我才会感到寂寞。

I'm lonely only when I am overtired, when I have worked too long without a break, when from the time being I feel empty and need filling up.

youdao

但现在我感到内心空虚，因为我一生最想往的事情是我不能成功的事。

But now I feel empty in my heart, because what I want to do most in life is the thing that I can't succeed.

youdao