Show me a man who though sick is happy, though in danger is happy, though dying is happy, though condemned to exile is happy, though in disrepute is happy. Show him! By the gods, I would fain see a Stoic. — Epictetus
The lesson from looking at the history of the human race and the long, long story of blood-stained evolution is that we must just make the best of our time in the universe. There may be no such thing as a full grown Stoic but at least we can try our best to meet our fate with a positive, strong spirit. Just making the best of it. Not weeping more than we can avoid. And helping our fellow travellers through the valley of the shadow of death.
The journey does not take long. Think of the hundreds of millions of years of life so far on Earth. The forgotten lives of humans and dinosaurs. Your 70 years or 370 years are nothing. Don't worry too much! It will soon be over.
But let us try to remember and give a little bit of immortality to those lives which have returned to dust and live with the awareness of eternity and those who were here before us.