Memento mori. Be mindful of death.
Let's look at it another way, the enormity of death shows us the precious value of being alive. GO out and live your life! Go do what makes you happy and feel alive. If you couldn't die, you wouldn't know you were alive, like a rock.
Many of those who have come close to death claim to feel more alive than they ever have, unless they are drugged out by pain killers and such.