A small quote from Yukio Mishima's Confessions of a Mask that I enjoy a lot:
"Added to the gloomy irritation that always threatened me when I was alone, the grief that had so shaken the foundations of my existence this morning when I had seen Sonoko was now revived still more poignantly
within my heart. It proclaimed that every word I had spoken and every act I had performed that day had been false: having discovered that it was less painful to decide a thing was false in its entirety than to torture myself with doubts as to which part might be true and which false, I had already become gradually familiar with this way of deliberately unmasking my falseness to myself. And even as I lay thinking, my tenacious uneasiness concerning what I called the basic condition of being a human being, concerning what I called the positive human psychology, did nothing but lead me around in endless circles of introspection."
Mishima himself would commit suicide later in his life.