I find it interesting that professing Christians often view meditation with suspicion. Yet King David wrote many beautiful psalms about his regular meditative practice and his meditations. The apostle Paul recommended meditating on the things we have learned. Jesus himself began his ministry with a 40 day meditation and continued to seek out solitude to meditate after that. The walking meditation above maps quite well to the contemplation that many saintly individuals have practiced and recommended. In short, they ought to be no barrier for any person of Judeo-Christian heritage to meditate.