Some people shake your foundations. In one encounter all of your deficiencies fall onto the floor, leaving you naked, embarrassed. You desperately try to hold onto the last remaining threads of what you held as absolute truths of yourself. But no, those have flaws and holes too. Confused, bedazzled, you seek validation. But validation cannot be sought from sentient beings.
You are left alone with the scraps of yourself on the floor. You try to put them together into a coherent whole again.
This process is personal transformation. Painful, but liberating. Traumatizing, but strengthening. Life altering. Character correcting. Life mission improving.