True art cannot be judged; it exists as a form of expression.
We each have things we do to express ourselves—a creative outlet. Maybe we want people to like what we do; maybe we will never share it with anyone else.
Some eventually seek opinions about their expressions. When that line is crossed, our expressions become something else: something more formal, something owned by others as well as ourselves.
When I use the word expressions here, I’m referring broadly to those activities we engage in that help us express something in ourselves. Art falls into this category, but it also might be music, writing, or any form of artistic endeavor. It also might be a physical expression. Dance is a more obvious example, but sports and other physical activities might be expressions too. Surfing lends itself well to expression. It might also be the way we present ourselves, our personality, or our fashion. There are many ways we can express ourselves.