You do

Introspection   makes most people ill
To find yourself, observe the things you do.
Keep eating stuff ,keep warm and pay the bill
Introspection   makes most people ill
Hit your head with bricks until you’re still
Most of us don’t really have a will
We have no power to learn  from any clue 
Introspection   makes some people kill
To stop yourself, don’t ruminate,catch flu.