C.G. Jung's letters to the artist and analysand Hedy Wyss, published here for the first time, are a unique testimony to Jung's vivid and sparkling spirit. Here we encounter the lively, compassionate and deeply human side of Jung's nature. He writes neither scientifically nor cautiously, but quite spontaneously out of his respective state of mind. He mentions his suffering from various physical ailments to Hedy Wyss, such as heart troubles and rheumatism. At the same time he struggles for the integrity of the analytical relationship and the veracity of love.