Is there anything special about the (absolute) number 30? Surely it's just saying roughly 'for the first [resp. last] half of your life'?
Tangentially, is that actually 'a Hindu saying' - all I can find are other people quoting Jobs and claiming the same - or is it just something a guru said that Jobs happened to like and remember?
Anecdotally my grandfather from India used to tell my father something similar as a child (and then him me), and he was born in the 1910’s in a village and very unaware of Jobs throughout his life. So I am confident that it’s from some Indian/Hindu school of thought. Only difference was he said “work hard first 30//enjoy next 30”.
Ah, so he had it backwards :)
“For the first 30 years of your life, you make your habits. For the last 30 years of your life, your habits make you.”
I'm not sure that making that last phase ten times longer is a good investment.