Abhijit Naskar said this quote

When I am fully immersed in my work of nourishing humanity, it fills my head with all kinds of feel-good chemicals, such as endorphins, serotonin and dopamine. Problems occur during the brief intervals between the finishing of one work and the beginning of another. During these intervals, my biology starts to get filled with stress hormones cortisol and adrenalin, that worsens my OCD. That is why, I can’t sit still even a day after I finish writing a book. Because if I do, my OCD begins to suffocate me inside my head. Hence, as soon as I deliver a work, I have to start working on my next scientific literature.