Charles H. Spurgeon on Psalms 91:12

Angels... shall bear thee up... lest thou dash thy foot against a stone. Angels are introduced as bearing up the believer in their hands, not that he may be carried in safety over some vast ocean, not that he may be transported through hostile and menacing squadrons, not that; when exposed to some extraordinary danger, he may be conveyed to a place of refuge, but, as bearing him up in their arms, "lest at any time he hurt his foot against a stone."... Angels, the topmost beings in creation, the radiant, the magnificent, the powerful —angels are represented as holding up a righteous man, lest some pebble in the path should make him trip, lest he hurt his foot against a stone. Is there, after all, any want of keeping between the agency and the act, so that there is even the appearance of angels being unworthily employed, employed on what is beneath them, when engaged in bearing us up, lest at any time we hurt the foot against a stone? Nay, the hurting the foot against a stone has often laid the foundations of fatal bodily disease: the injury which seemed too trifling to be worth notice has produced extreme sickness, and ended in death. Is it different in spiritual respects, in regard of the soul, to which the promise in our text must be specially applied? Not a jot. Or, if there be a difference, it is only that the peril to the soul from a slight injury is far greater than that to the body: the worst spiritual diseases might commonly be traced to inconsiderable beginnings. . . . It can be no easy thing, this keeping the foot from being hurt against a stone, seeing that the highest of created beings are commissioned to effect it. Neither is it. The difficulty in religion is the taking up the cross "daily, "rather than the taking it up on some set occasion, and under extraordinary circumstances. The serving God in little things, the carrying religious principles into the details of life, the discipline of our tempers, the regulation of our speech, the domestic Christianity, the momentary sacrifices, the secret and unobserved self denials; who that knows anything of the difficulties of piety, does not know that there is greater danger of his failing in these than in trials of apparently far higher cost, and harder endurance; if on no other account, yet because the very absence of what looks important, or arduous, is likely to throw him off his guard, make him careless or confident, and thereby almost insure defect or defeat? Henry Melvill.