I and Thou by Martin Buber
Ich und Du, usually translated as I and Thou, is a book by Martin Buber, published in 1923, and first translated to English in 1937. Buber's main proposition is that we may address existence in two ways: that of the "I" towards an "It", towards an object that is separate in itself, which we either use or experience; and that of the 'I' towards 'Thou', in which we move into existence in a relationship without bounds. One of the major themes of the book is that human life finds its meaningfulness in relationships. All of our relationships, Buber contends, bring us ultimately into relationship with God, who is the Eternal Thou.