From infancy, infancy, childhood, adolescence and so on. For example, I came to this world in the expectation of a family. I had a confused childhood, and I have less memories at this stage. I was full of yearning for the unknown exploration in my childhood, and my teacher had a great influence on me until I became mature and considerate in my youth. My peak and trough are in childhood and adolescence respectively, because of my own situation.