And what has youthful night-sleep in a pile of autumn leaves in a Vienna park to do with the later emergence of Islam? Submission.

Or a morning merendino and ristretto amidst the Dolomites after a wakeful, cool sleep by rucksacks in the nearby copse? Need.

Or barefoot on hot sand in desert stone-hut, a guest of a wiry-haired Afrikan and his woman in al-Aqaba? Gratitude.