Tipping Point

When Steve Jobs was designing the building for Pixar, he wanted to make sure that the cartoonists, the computer programmers and the business people interacted, rather than isolating themselves into like-minded groups.  So he created a common atrium for the building, into which he placed facilities that all people would share in common -- they would have to "mix" in this area. This led to creative collaborations that they never would have experienced otherwise.

There are advantages to working through the issues associated with being together with people who are not like us.  Who do not share our beliefs.  Who even believe that we are wrong.

Taking that idea to its extreme, there are advantages to staying in an organization with people who believe differently that we do. 

How do you decide?  How do you know when you should stay in a group with people who believe differently?  How do you know if God is calling you to this environment so that you can change minds?  Bring light to darkness? 

And how do you decide that you absolutely cannot remain?  That what is happening is so against your beliefs that you can't be associated with it?

I'm not facing this question, but I've heard of a couple people lately who are.  Where is the tipping point between being an influence and allowing your presence to be taken as assent with what is happening?