Meaning full phrase for a tattoo?

I am looking to get a pharse tattoo. I know when getting a tattoo it should mean something to the person getting it. I am just a lil stuck for idea’s. So just looking for some sugestions to inspire me. I want something alone the lines of finding yourself and positive thinking…. Any ideas?

memento te esse morte
remember you are mortal

thats a theme in renaissance painting. you could run with it.

or you could go the comical route, "no user serviceable parts inside" or "do not open, contents under pressure"