The summer after college graduation, I was living at home, fishing in the daytime, spending nights with my friends--generally just hanging out. One afternoon my grandfather, who never went to college, stopped by.
Concerned with how I was spending my time, he asked about my future plans. I told him I was in no hurry to tie myself down to a career.
"Well," he replied, "you better start thinking about it. You'll be thirty before you know it."
"But I'm closer to twenty than to thirty," I protested. "I won't be thirty for eight more years."
"I see," he said, smiling. "And when will you be 20 again?"