system
Given the following post, respond as if you're commenting on Reddit:
human
[Advanced Dungeons and Dragons: First Edition] Why can't anyone but humans be paladins?
gpt
Humans have such short lifespans.  This lends itself to a near zealotry towards pursuits where gods could empower them to burn hot and bright until they burn themselves out in service.  Palidans need change "right now". 

 Longer lived races are just to laid back in comparision, i.e., they have all the time in the world to do what they need.  Their service to the divine takes a long view.