Martin Buber was an explorer of human nature. At the core of his thought, even when he dealt with problems of religion and the concept of God, his concern was the human essence and man’s position in the world. This is so even in his earliest writings before what is considered the turn in the development of his thought, such as his book Daniel, published in 1913. Although the theme of that book is the mystical experience, the union of man and God, Buber is also interested in what the mystical experience can reveal about human activity and nature.