How we cite our quotes: (Chapter.Paragraph)
Quote #1
I can't stop thinking.
Formulating hypotheses and dismantling them.
Struggling to wrap logic around everything that's happened. (3.267-269)
Even though Jason doesn't work as a research scientist anymore, he still thinks like one, using the scientific method to understand the situation he finds himself in. As it turns out, this technique comes in quite useful.
Quote #2
Experimental physics [...] is about solving problem. However, you can't solve them all at once. There's always a larger, overarching question—the big target. (5.174)
Again, we see how science defines Jason's worldview. He might not be calculating the gravitational fields of black holes, creating complex algorithms, or inventing a machine that makes traversing the universe as easy as riding a bike, but he still uses those same skills to overcome his trials and tribulations.
Quote #3
I have to separate myself from the fear, the paranoia, the terror, and simply attack this problem as if I were in a lab—one small question at a time. (5.176)
On some level, Jason clings to his scientific worldview because it's a lot better for his mental health than otherwise. With the scientific method, he feels like he's actively working to solve his problems. Without it, he just feels adrift and confused.