Words cannot even describe how much I adore Stephen King’s works and sometimes it’s very difficult to quote them because they all have such valid and interesting things to say. However, apart from the Different Seasons quote you already posted (which I believe is from ‘The Body’), two I really like are:
“Hearts can break. Yes, hearts can break. Sometimes I think it would be better if we died when they did, but we don’t.”
Hearts in Atlantis
“Go then, there are other worlds than these.”
The Gunslinger