Hey,
For the discovery module, your main focus should be on the concepts of discovery rather than themes within the text (the latter can often lead to a lot of plot detailing if you're not careful). So, try to arrange your quotes by the discoveries made rather than the themes. I usually start with the most obvious discoveries. I did Motorcycle Diaries, so there were a lot of physical discoveries being made by Guevara himself.
So, the way I arranged my quotes was:
--- INDIVIDUAL ---
Physical discoveries
-> Curious nature of Guevara drives himself to physically explore : quote
-> Speculative nature of Guevara's old ideas are underpinned by his discoveries : quote
-> Physical discoveries also lead to spiritual and emotional discoveries : quote
Spiritual discoveries
-> Spiritual exploration are often the result of emergence of unexpected discoveries : quote
etc.
I believe this is a better approach because it forces you into the mindset of what examiners want -- your perspective on discoveries being formed within the text, and then your interpretation of what it means to the audience. They also allow you to make sure you're on the right track in terms of the direction of your essay. You don't want to be retelling the synopsis to a chapter of the text when that could have been used for deeper connections to the module's area of study, discovery.