"Lieb says he was inspired by a story of King Solomon who was given a ring with the inscription 'Gam zeh ya’avor' – 'This too shall pass', bringing him to the realisation that his wealth and power were fleeting. (Bnei Binyomin on Avos; Chapter 1, Mishnah 7.)" (source)
"In this case, it is an inyan of a complete break with reality, coupled with apparent paranoia. I am convinced that she has begun to believe her own fiction, especially the part where she believe she has done 'endless chessed for those who spit in the face of chessed.' Gam zeh ya’avor. Obviously Hashem feels I need this particular nisayon right now. Let it be a kaparah." (source)