to throw over reality a light that never was 不定式做后置定语,修饰前面的A desire,其中that never was定语从句修饰 a light,throw a light over reality,因为a light 带定语从句,所以后置了。
on the part of 如图是by或from的意思
what we might consider a novelist-scientist 宾语从句,是前面of的宾语
to record exactly and concretely the structure and texture of a flower不定式做定语修饰the desire,这不定式主语是前面的宾语从句所表达的那些人
整句主干是A desire might give way abruptly to the desire