以下这一段英文是什么意思 the worst spots and here and there the not-so-b

以下这一段英文是什么意思 the worst spots and here and there the not-so-bad spot
以下这一段英文是什么意思?
禁止用翻译器来糊弄人,诚心求英语高人：
It is not so bad being ignorant if you are totally ignorant; the hard thing is knowing in some detail the reality of ignorance, the worst spots and here and there the not-so-bad spots, but no true light at the end of the tunnel nor even any tunnels that can yet be trusted.
另外：
上文中“the worst spots and here and there the not-so-bad spot”中的
1）“the worst spots"和”the not-so-bad spot"分别什么意思?指代什么?
2）and here and there在文章中什么意思?有没有其他用法?
3）the worst...sports在文章中的插入结构作什么成分?修饰什么?