At fifteen, my mind was bent on learning.
At thirty, I stood firm.
At forty, I had no doubts.
At fifty, I knew the decrees of Heaven.
At sixty, my ear was receptive to truth.
At seventy, I could follow my heart's desires without sin.
At 50, if you are on a diet on your birthday, you can't eat a piece of your birthday cake. So grab two, a piece in each hand and, lo and behold, you will be on a balanced diet! Happy birthday, old chum!
I have achieved my seventy years in the usual way: by sticking strictly to a scheme of life which would kill anybody else... I will offer here, as a sound maxim, this: That we can't reach old age by another man's road.