Step 1: Analyze meaning
The autobiography offers a "rare glimpse" into vulnerabilities, so reflections are honest.
Step 2: Analyze options
- superficial means shallow, opposite of deep insight.
- candid means honest and straightforward, fits well.
- deceptive means misleading, opposite meaning.
- indifferent means unconcerned, unrelated here.
Conclusion:
"Candid" best fits the context.