Rumi… “Out beyond ideas of wrongdoing and rightdoing, there is a field. I’ll meet you there. When the soul lies down in that grass, the world is too full to talk about. Ideas, language, even the phrase each other doesn’t make any sense.”
I think Rumi is talking of a place beyond the narrow-minded assumptions of mankind that there is only good and evil, or black and white. He is talking of a place where things are much more ambiguous; every person has conflicting feelings of both good and bad and instead of black and white, there are grey areas.
Here, the world becomes much harder to understand, but because there are no ideas or languages, there is no need for conflict in this world, as such things seem to spur conflict.
There is no “each other” because everything, and everyone, is a collective mass, sharing many of the same qualities, feelings, and insight, and in that, they are united and capable of nearly anything. There is strength in numbers.
This is what Lee’s character wants to say to his group of friends and to the world with his kind manner, listening ears and desire to become an Art Therapist.