Above all, the Transcendentalists believed in the importance of a direct relationship with God and with nature. Emerson wrote in his essay Nature that "The foregoing generations beheld God and Nature face to face; we — through their eyes. Why should not we also enjoy an original relation to the universe?" Theodore Parker spoke of man's relation to God in particular in his powerful sermon "A Discourse of the Transient and Permanent in Christianity" (also known as the "South Boston Sermon, which was delivered in 1841. Parker wrote,
In an age of corruption, as all ages are, Jesus stood and looked up to God. There was nothing between him and the father of all; no old world . . . no sin or the perverseness of the finite will. . . . He would have us do the same; worship with nothing between us and God; . . . and we never are Christians as he was the Christ, until we worship, as Jesus did, with nothing between us and the Father of all.
Thoreau, who was born and lived almost his entire life in Concord, went to live at Walden Pond in 1845 to experience nature directly and intensely and to test his Transcendental outlook in the concrete physical world. In the chapter of his book Walden titled "Solitude," he wrote of his connection with nature as a very intimate, two-way relationship:
The indescribable innocence and beneficence of Nature, — of sun and wind and rain, of summer and winter, — such health, such cheer, they afford forever! . . . Shall I not have intelligence with the earth? Am I not partly leaves and vegetable mould myself?
Thoreau's expression of his essential oneness with nature suggests the concept at the very heart of Transcendentalism, that of the Oversoul. The Oversoul formed the encompassing framework within which a direct relationship with God and with nature was so essential to the Transcendentalists. Simply described, the Oversoul was a kind of cosmic unity between man, God, and nature. Emerson wrote an essay titled "The Over-Soul," which was included in the first series of his Essays (published in 1841). In it, he described the Oversoul as:
. . . that great nature in which we rest . . . that Unity, that Over-Soul, within which every man's particular being is contained and made one with all other. . . . We live in succession, in division, in parts, in particles. Meantime within man is the soul of the whole; the wise silence; the universal beauty, to which every part and particle is equally related; the eternal ONE.
