"The whole of existence frightens me," protested the philosopher Soren Kierkegaard; "from the smallest fly to the mystery of the Incarnatiion, everything is unintelligible to me, most of all myself." By contrast, the evolutionary reductionist Ernst Haeckel, writing in 1877, commented that "the cell consists of matter...composed chiefly of carbon with an admixture of hydrogen, nitrogen and sulphur. These component parts, properly united, produce the soul and body of the animated world, and suitably nourished become man. With this single argument the mystery of the universe is explained, the Deity annulled and a new era of infinite knowledge ushered in." Since these remarks of Haeckel's, uttered a hundred years ago, the genetic alphabet has scarcely substantiated in its essential intricacy Haeckel's carefree dismissal of the complexity of life. If anything, it has given weight to Kierkegaard's wary statement or at least heightened the compassionate wonder with which we are led to look upon our kind.
"A conviction akin to religious feeling of the rationality or intelligibility of the world lies behind all scientific work of a high order," says Albert Einstein. Here once more the eternal dichotomy manifests itself. Thoreau, the man of literature, writes comopassionately, "Shall I not have intelligence with the earth? Am I not partly leaves and vegetable mould myself?" Or Walt Whitman, the poet, protests in his Song of Myself: "whoever walks a furlong without sympathy walks to his own funeral drest in a shroud."
Loren Eiseley, from "Science and the Sense of the Holy"