Answer:
"I never found the companion that was so companionable as solitude". Paragraph 1.
Step-by-step explanation:
Self-analysis is the attempt by a writer to understand certain aspects of his personality through a conscious analysis. In the excerpt above, Walden analyzed his disposition to solitude.
Solitude was an aspect of his personality. He enjoyed being alone in secluded places where he could think deeply about life. Thoreau performs a self-analysis by reflecting on this aspect of his life, without the input of another person.