It's not the helmet that keeps them out.
The power comes from within.
The mind is very vulnerable to attacks and disappointments.
One can only assume that bad experiences would cause him to create a mental shield for protection
from further damage.
Is he a careless being or does he care too much and is afraid of being hurt again?
I am no hero. Merely a man who has seen and done and endured what can never be forgotten or forgiven.
Magneto ~ Uncanny X-Men #196
