nonacceptance of a scenario or perspective that is foreign to self is the same as pushing it away. when people think upon ideas that ARE at their center, the contrary either comes to mind through simple pondering, or it's brought to them from outside. either way...adopting CERTAIN ideologies that by definition don't allow for its inverse gives the believer license to put certain things "out of the realm of possibility" without thinking about them at all. not a bad thing to do if you're believing in a say "monotheistic tradition", because for these ideologies, it reinforces the ONE WAY thinking if you don't even have to THINK of integrating something "else" into your thinking. (interestingly enough, looking at the permutations of christianity as it makes it's way through indigenous areas and changes to ADOPT and ADAPT to those peoples' traditional beliefs kinda shows that either the people or the ideology itself isn't as rigid as it claims. but that's a whole other can of worms.)