How well do you know yourself?

I once wrote, “I've lived with myself for thirty-two years and I still know almost nothing about myself.”

Now it's thirty-eight years, and not that much has changed. Hahaha.

If I still don't fully understand myself, how easily can I say, “I know exactly what that person is like”?

Before I pretend to understand other people, I want to remember how much of myself is still unknown.