Man has an inherent desire to evolve,
and therefore feels gratified only when he develops.
When his development stagnates, he can feel happy for a while,
but soon will feel tired and move on, seeking for something new.
Evolution is the very purpose Man should live for
as long as he is endowed with life.
Thus we should develop ourselves on a daily basis
and strive to evolve step by step.
That is the purpose for which we live.