In Halakhic Man, the Rav paints a picture of Jewish law as a guidebook that leads us from what to do to an orientation of how to be as a Jew. Rav Soloveitchik understands the details of Halacha to point us on how to live a deeply divine life in a deeply human world.
In The Lonely Man of Faith, the Rav welcomes us into this solitude, and sanctifies our own loneliness alongside his.