Hey Caitlin! Glad to hear from a fellow nerd 
I like this Thesis! I think it would work better if you used a synonym for discoveries in the second sentence, or perhaps framed it a little differently, right now it is repetitious. Your expression in the last part of that second sentence could also perhaps be polished ever so slightly, just a tad messy:
Discoveries often act as catalysts for the cultivation of maturity in an individual’s life. This growth is stimulated by evocative discoveriesSYNONYM, both deliberate and unforeseen, made within the paradigms of emotion, intellect and spiritualism, andthus grantsing the individual the lucidity to challenge and question their past perspectives.
I think this is a really great Thesis! Well developed, though you may want to practice linking it to questions once Year 12 starts. I love that you have ideas already, if you are writing this already you should feel super confident for the 12 months ahead! 
Hello again, I've modified them following your instructions in two ways:
1. Discoveries often act as catalysts for the cultivation of maturity in an individual’s life. This transformation, stimulated by evocative realisations both deliberately planned and unforeseen, occurs within the paradigms of emotion, intellect and spiritualism and consequently grants the individual the lucidity to challenge and question their past perspectives.
2. Discoveries often act as catalysts for the cultivation of maturity in an individual’s life. This growth is stimulated by evocative realisations, both deliberately planned and unforeseen, made within the paradigms of emotion, intellect and spiritualism, thus granting the individual the lucidity to challenge and question their past perspectives.
Personally I think the first one is better because it sounds smarter, but using big words =/= logic and sense. Can I get an expert opinion pls?