有一道题是这样的：

I felt that I had never read any story that attracted me as much. I began to discover the world of English literature and found that all the different books and stories I came across opened my eyes to a different world from the one I had been familiar with.

这里的discover是答案，为什么不能选find呢？我查字典发现discover和find几乎是相互用来解释对方的词，都有“发现”的意思，请问有什么明确的区别吗？