Time, Health and Money

i was talking to a friend the other day about being at work and how life is becoming like a routine for me since i started going back to work for the holidays.

he then mentioned that there are 3 things that are present in life -- time, money and health.

when you're studying, you have time and health, but no money.
when you're working, you have money and health, but no time.
when you're retired, you have the money and time, but no health.

it's just quite impossible to have everything in life at any period of time, i guess it's how we make the best out of the situation :/