They are groups that profess more radical or extreme philosophical beliefs.

He and his sister Lei Xiao Yu both have an extreme belief in love.

What led them to their extreme beliefs?

A middle-aged townswoman with a borderline reputation as a witch and an extreme belief in a bloodthirsty God.

However, some rebels are worried by their extreme beliefs and tactics.

Those with extreme political beliefs, right or left, tend to be happier than moderates-although their provocations lower happiness for the rest of society.

However, some rebels are worried by the extreme beliefs and tactics used by the Islamists.

The events seem to be simply examples of a modern tendency to act out relentlessly the most extreme beliefs.

It also says nothing whatsoever about the danger that certain forms of extreme religious beliefs bring to our Europe.

He's a person with extreme beliefs and he really thinks he's making a difference.