James pointed out how quickly we have tended to reject the claims of the mystics of the world. James pointed to the commonalities of the experiences of mystics in various times and places and traditions. While their experiences have variety - they are not identical, there is also a high level of commonality. Many appear to be talking about the same thing, even when the come from very different traditions. The result of such communication is a new zest for life, and consistently it seems to produce a new kind of peace, a kind of inner security, and an ability to deeply accept and love others.
Many mystics seem to attest to the oneness of humanity, and the interdependence of all life.
The bigotry of most religions has no place in the mystic's experience. The distinctions between people lose all meaning. They affirm the transcending power of love. They aren't speaking code to be deciphered - they are speaking their vision of what is true. It's just that we are sure we know better and they couldn't mean to challenge us as much as they do.