Филип Ѓ.

“Jealousy—at least as far as he understood it from his dream—was the most hopeless prison in the world. Jealousy was not a place he was forced into by someone else, but a jail in which the inmate entered voluntarily, locked the door, and threw away the key. And not another soul in the world knew he was locked inside. Of course if he wanted to escape, he could do so. The prison was, after all, his own heart. But he couldn’t make that decision. His heart was as hard as a stone wall. This was the very essence of jealousy.”
― Haruki Murakami, Colorless Tsukuru Tazaki and His Years of Pilgrimage