Young man, if the ways of the world were not allowed to change you, what might this world become?
Perhaps in the end they won’t be able to change anything. But when they grow old, they’ll have fewer regrets and less remorse, and more happiness. That will be enough.
Like every one of our lives, our days are limited. There’s no need to worry too much about tomorrow. Live well in the present, and find peace within. That is enough.