What does Thoreau say about the topic of solitude?

Walden sats that solitude affords him freedom... he is bound and beholden to no one.... just like the nature he surrounds himself with.

We are wont to imagine rare and delectable places in some remote and more celestial corner of the system, behind the constellation of Cassiopeia's Chair, far from noise and disturbance. I discovered that my house actually had its site in such a withdrawn, but forever new and unprofaned, part of the universe.

I experienced sometimes that the most sweet and tender, the most innocent and encouraging society may be found in any natural object, even for the poor misanthrope and most melancholy man. There can be no very black melancholy to him who lives in the midst of nature.

Be a Columbus to whole new continents and worlds within you, opening new channels, not of trade, but of thought... It is easier to sail many thousand miles... than it is to explore the private sea, the Atlantic and Pacific Ocean of one's being alone.