In answer to your question, Kate, Ram Dass is one of the great spiritual teachers of our age. His books "Be Here Now" and "The Only Dance There Is" were instrumental in my spiritual growth, and dare I say, for hundreds of thousands as well. After his stroke, he moved to Maui. You can read more about his work and his organization here: Ram Dass and here on Wikipedia.
Here is a photo I took on the same day I took his photo. We were driving up the Haleakala Highway to Kula with a rainbow sometimes directly ahead, sometimes to the side of us as we circled up the mountain. Depending upon the light and the angle, this rainbow would dim or brighten.