50+ times pictures blew our minds and were completely unexplainable

At first glance, this looks like just a nice poem for anyone who is passing by to read and reflect upon thoughtfully. It almost comes off as a message for people to respect cemeteries and the bodies buried there. The message is fine, but the way it was worded could use some updating, and it leaves an odd impression. 

Just what exactly do they mean by saying ‘as we are now, so shall you be!’? Are they making threats toward the living and trying to imply that zombies will come back from the dead to get us one by one? Perhaps they just meant to enjoy your time alive, while you still can.