Analects

at fifteen you set your heart on learning

at thirty you stand as a teacher

at fifty you feel the mandate to teach

at sixty your ears attuned to your pupils

at seventy you follow your heart's desire without overstepping the boundaries of the righteous

have you lived a fulfilling life?

any regrets?

you could your hearty possibly desire at seventy that you couldn't desire when you were younger

with that being said

perhaps knowledge & wisdom you have accumulated over the years has provided you with this desire

remember

not all old people are wise and not all young people are knowledgeable