To achieve some depth in your field requires a lot of sacrifices. Want to or not, you're thinking about what you're doing in life-in my case, dancing.
“We will all, someday, experience death, and become obsolete as a dead leaf falling from a tree, crushed by passersby to ashes underlying the earth.”
“Middle age is when your old classmates are so grey and wrinkled and bald they don't recognize you.”