As we grow older, our range of activities naturally narrows compared to our younger years. However, in exchange, we begin to notice things we once overlooked, develop new interests, and sometimes find ourselves deeply moved—even grateful. This shift becomes especially pronounced after retirement. In a way, the behavioral focus of older individuals moves toward the micro: an increased awareness of and appreciation for the natural world and the small details of daily life. While our physical space may shrink, our mental space tends to expand, which may be an essential condition for experiencing the depth of life. Conversely, as the Japanese idiom says, “Let the young travel,” younger people are naturally drawn to the unknown, seeking adventure and broadening their horizons in a macro direction. I was no different in my youth. Yet whether our consciousness moves toward the macro or the micro, both perspectives expand the dimensions of our awareness, offering valuable lessons and fos...