Question

And yet I still act sometimes like I was only about twelve... It's partly true, too, but it isn't all true. People always think something's all true.Choose one
1. People can be a mystery to themselves.
2. Things are not always black and white.

Answer 1

2. Things are not always black and white.

The speaker points out that a statement can be "partly true" without being the whole truth and criticizes the common tendency to treat something as entirely true or false. That emphasizes nuance rather than an inscrutable inner self.