I think this song means about losing loved ones and realizing we're all going to die one day, but don't let the realization consume you and keep on living life, and that you must spend as much time with your loved ones as possible. It's something to remind us that we must not wallow in sadness, but cherish the memories you've had with a loved one that passed. I also think this song states that if you realize you're about to die, there's nothing you can do to stop it if its been predicted by a medical professional. Overall, It's a beautiful song about attempting to not allow yourself to drown in grief and existential dread that we're all going to die one day and that everything we do won't matter in the end, but have also got to realize how much of a positive effect we have on others and ourselves, which makes living life more bearable.