Solitude matters, and for some people, it's the air they breathe. With more and more people flow into the city and more and more social app appear, do you still remember what is solitude? Generally speaking, solitude means no communication with others. However, different inner motivations results in different forms of "solitude", and the true solitude comes from the high-level need. The human brain can be divided into three layers, and the instinctive layer is most sensitive to the environment. Thus, people's attention will be interrupted by surrounding easily. To enjoy the solitude and be more creative, we need some private spaces to be alone. The distracting things are different. Some are noisy, some are quite. So I thought of three ways to be alone, including surrounding, dividing and avoiding.