In recent years, Jung has attracted new attention for his environmentalist insights about the psychological dimensions of the human relationship with nature. This chapter looks at the full array of Jung's nature writings in conjunction with his deeply meaningful personal experiences with nature, starting with his pastoral childhood and rural upbringing in late-nineteenth-century Switzerland. Even though Jung himself might object, this chapter argues that Jung qualifies as a “nature mystic” in the basic meaning of that term, as a person who draws direct psychospiritual energy from, and feels an overwhelming kinship with, the whole of the natural world. Jung craved the purifying effect of immersing oneself in nature, and he expressed concern about the profoundly damaging psychological effects of the modern world's increasingly fast-paced, technologically driven, environmentally destructive ways.