Using my GoogleFu I found these illustrations are borrowed by the Watchtower corporation. Read them and you should find a familiar story.
1. Is your jar full?
http://go.webassistant.com/wa/upload/users/u1000057/workspaces/30stories/#jar
http://vitalitynaturalhealth.ca/how-are-you-filling-your-jar-of-life/
2. What kind of coal are you - By Troy Nicholson
It really makes you wonder what the GB are reading. But more disturbing is they claim these works as their own.
Besides these and the John Ankerberg "forever" illustration, does anyone know others the Watchtower stole?