If you have no purpose in life, going into the wilderness gives you an instant purpose: survival. Your only job, from day to day, is to take care of your basic needs for food, water, shelter, and heat, and your only company is yourself. You have plenty of time and opportunity to observe the changing nature of nature itself. You witness a sunrise and sunset every morning and evening. You see clouds forming, dropping rain, and breaking into blue sky. Your body feels keenly how the day starts out cool, warms up gradually, and cools down again as it turns to evening—something you might never feel if you spend all your time in a climate-controlled environment. If you're near the ocean, you witness the tide going in and out each day. The moon changes a little bit each night. And the plants and animals around you change visibly too. Even over the course of a single week, you can watch a seedling sprout out of its pod, a flower bloom, berries ripen, the progression of a bird's nest or beaver's dam being built.