One cannot help feeling that in presenting the picture of the lonely man of faith, the Rav is presenting a picture of himself. The contrast is by now famous between the two Adams, the Adam of conquering the earth, the technological modern man, and the second Adam, the Adam of inwardness, the lonely man of faith. The enormous dedication and effort that the Rav shown in his teaching and communal work have their parallel in the tremendous dedication and effort he gave to his own thinking, and inner life.
This work is not only an important Jewish work of thought but can be of instruction to anyone who wishes to have a glimpse of what authentic religious experience is.

and not totally incomprehensible - don't let other reviewers' comments scare you off (though I do think if I reread this book in a few years when I know more, I would get more out of it). Solovetchik asserts that each of us has two halves- the "majestic" half that seeks to conquer the universe, and the half that seeks spirituality through contemplation. He further asserts that people of faith are "lonely" in two ways: (1) though they wish to focus on contemplation, they must also spend time in the material world to be completely fulfilled; (2) in our culture in particular, even religion tends to be oriented towards "majestic" considerations (that is, utilitarian goals) rather than passive contemplation of and obedience to our Creator.