Duality.

Why is dualistic living of the simple minded?...

Because its easy.

It's easy to cling to what you think is right and if you just cling hard enough--your reward will be greater.

When the truth is that--the embryo that splits in 2--is still 1. You.

1 and 2 and 1 and 2

There's no running away from the fact that All is Atum.--

Attempts to do so is just part of the process of learning you have choice, in order to teach you--there is no choice because all choice is designed to bring you back to One.

If there is a religion that tells you if you don't think like the flock thinks, then you've made your choice away from the flock's mindset, and therefore need to be removed from the flock--this is a duality mindset of said religion.
(Simple minded)

The greatest gift you'll ever receive is when the religion tells you that you don't belong.

And if you haven't received that message yet--it just means you are not challenging the religion enough.

More here.