This quote if from Pierre Teilhard de Chardin, who was a French Jesuit priest trained as a paleontologist and a philosopher, (1 May 1881 – 10 April 1955). and wrote this:
We are not human beings having a spiritual experience; we are spiritual beings having a human experience.
Paraphrased variant: We are not human beings on a spiritual journey. We are spiritual beings on a human journey.
