Part 2.
We humans on earth need to gather with different religions and cultures to do what is called ‘dialogic dialogue’ to distinguish it from the dialectic dialogue in which one tries to refute the claims of the other.  In ‘dialogic dialogue’, the partners meet each other in an atmosphere of mutual understanding, ready to alter misconceptions about each other and eager to appreciate the values of the other.   In this process, individual elements do not lose their identity, but rather deepen and fulfill it through dialogue, discovering what is most authentic in each other, releasing creative energy toward a more complexified form of religious consciousness.  
Through this process, Teilhard calls center to center union happens.
When such a creative union is achieved, then the religions will have moved into the complexified form of consciousness not a mere universal, undifferentiated, abstract consciousness.   Christ of the 21st Century