Oh my god this is so true, i did this by graduating high school on time while battling depression and the recent death of my biological dad (whom i never met) as most of the aunts and uncles didn't think i could do it, maybe cause they hadn't themselves despite being smart people.
Actually, it seems this quote mentions nothing about ethics or morality of actions. It merely says doing the things people tell you not to feel really good. So killing others is not excluded as "a great pleasure". If killing give you pleasure and people say you can't do it this quote still applies.