Extremeness comes when we live our life based on particular ideologies, belief, propaganda, living with memories<past>,Addiction ,trying or wanting to be perfect, Isolation, keeping hurts, feeling guilt, concerned about social image etc
The brain eventually loses sensitivity and creativity becomes dull and mediocre because it is conditioned by some Particular belief, ideologies, the brain feels caged ,oppressed and tries to escape from facts.
Do some creative work don't ask to others "Do what you love without fear" ,don't try to be perfect and don't think what others will say .