A desire to throw over reality a light that never was might give away abruptly to the desire on the part of what we might consider a novelist-scientist to record exactly and concretely the structure and tecture of a flower.
A desire(主语) to throw over reality a light that never was (动词不定式短语修饰a desire) might give away (谓语)abruptly to the desire on the part of what we might consider a novelist-scientist to record exactly and concretely the structure and tecture of a flower.