seihanndas:

You’ve never even lived. You don’t understand the least bit about grief. It’s not just grief. There are as many emotions as there are people. The fragility of someone who lets their anger get the best of them. The strength to be able to overcome fear because of love. You can’t comprehend anything about them. So how can you possibly pass judgment on them?

It’s a Memento Mori. Apparently it means: “Remember that you must die”.
Do not forget that you surely will die someday, and as such, that is all the reason to live now” is the message contained in that phrase.