Gregory the Great

(Mor. xiv. 55.) But there are who observing that the spirit is loosed from the body, that the flesh is turned to corruption, that the corruption is reduced to dust, and that the dust again is resolved into the elements, so as to be unseen by human eyes, despair of the possibility of a resurrection, and while they look upon the dry bones, doubt that they can be clothed with flesh, and be quickened anew to life.