Pythagoras was not only a mathematician but also a philosopher.
Considering the stages of human existence, he compared them with the seasons.
According to this theory, each stage lasts 20 years.
The first stage is like spring when nature is starting to wake up.
A child gets their name, learns to talk, goes to school to learn to read and write.
A teenager chooses a profession, then, finishes college and sometimes university.
During the next stage, an adult often gets married and has their own children.
He is full of energy.
But then, after 40, a middle-aged person starts to grow old.
They start to rethink their lives and achievements.
After retiring, it comes another age which is like winter.
But, I think, everything depends on a personality.
Sometimes some teenagers feel like old people and there are old people full of joy and energy.
October 2016
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