Read the series.
“Nobody knows the trouble I’ve seen; nobody knows my sorrow.” We all know the song—or at least that much of it—and we all know the feeling.
Oh, it’s true that the losses, disappointments, failures, and wrongs that tend to lead to bitterness are “common to man” (1 Cor. 10:13), but at the same time, each person’s experience is unique. Our hearts tell us no one understands or can understand.
From there, it’s a small step downward to the attitude that no one cares. Sometimes it may even be true.
Look to the right and see: there is none who takes notice of me; no refuge remains to me; no one cares for my soul. (ESV, Psalm 142:4)