There are two ways of reading that last question.

有两种方式来解读后一个问题
"'Who he really was' was entirely his secret."

"'他的真实身份'始终是他的秘密"
If we read that, "who he really was" as a colored guy

如果我们这么解读"他的真实身份"就是
from East Orange, then we'll see it as that being his

东奥兰治的一个有色少年
secret.

我们会将这看作时他的秘密
But you can read it, you can parse that grammar,

但你可以用另一种方式来解读
a different way. "Who he really was was

来解析它的语法"他的真实身份是
'his secret.'"

'他的秘密'"
Could it be because who he really was was "his secret," secrecy as the

是因为他的真实身份才是"他的秘密"
essence of identity?

秘密是身份的本质
It doesn't matter what's in that hidden box.

话语里藏着什么并不重要
It doesn't mean that we have to fill it in.

我们无须去填补它