英语好的帮忙来看看这个段落

题目

英语好的帮忙来看看这个段落
And the data for the engendering of my certainty as to this lack of soncience on the part of these booksellers were completely formed in me ,when ,while I was a professional "Indian Fakir,"I needed,for the complete elucidation of a certain "ultraphilosophical"question also to become familiar,among other things,with the associative process for the manifestsation of the automatically constructed psyche of contemporary booksellers and of their salesmen when palming off books on their buyers.
谁能帮我分析一下这个段落的结构?尤其是那个when 后面的部分,完全看不懂啊!
我看N遍了！那个，among和with以及后面的句子修饰的是谁？到底是谁？need的宾语是谁？有这种need for sth.to do sth.

答案

供参考：
当我以印度苦行僧为职业时,
需要透彻理解一个超哲学的问题,
也因而见多了一些事情,
当中包括一些相关的世面,
就是现代的书商及他们的销售员在向买家骗卖时所自然而成的心态,
而我之深信这些书商无良,
乃是在这时
已全然有所依据.