Adams on Psalm 66:12, 13

12 Thou hast caused men to ride over our heads The agents are men. Man is a sociable living creature and should converse with man in love and tranquillity. Man should be a supporter of man; is he become an overthrower? He should help and keep him up; doth he ride over him and tread him under foot? O apostasy, not only from religion, but even from humanity! Quid homini inimicissimum? Homo (Seneca.) The greatest danger that befalls man comes whence it should least come, from man himself. Caetera animantia, says Pliny, in suo genere, probe degunt, &c. Lions fight not with lions; serpents spend not their venom on serpents; but man is the main suborner of mischief to his own kind ...
1. They ride. What need they mount themselves upon beasts, that have feet malicious enough to trample on us? They have a "foot of pride" Ps 36:11, from which David prayed to be delivered; a presumptuous heel, which they dare lift up against God; and, therefore, a tyrannous toe, to spurn dejected men. They need not horses and mules, that can kick with the foot of a revengeful malice, Ps 32:9.
2. Over us. The way is broad enough wherein they travel, for it is the devil's road. They might well miss the poor, there is room enough besides; they need not ride over us. It were more brave for them to justle with champions that will not give them the way. We never contend for their path; they have it without our envy, not without our pity. Why should they ride over us?
3. Over our heads. Is it not contentment enough to their pride to ride, to their malice to ride over us, but must they delight in bloodiness to ride over our heads? Will not the breaking of our arms and legs, and such inferior limbs, satisfy their indignation? Is it not enough to rack our strength, to mock our innocence, to prey on our estates, but must they thirst after our bloods and lives? Quo tendit saeva libido? Whither will their madness run? But we must not tie ourselves to the letter. Here is a mystical or metamorphical gradation of their cruelty. Their riding is proud; their riding over us is malicious; and their riding over our heads is bloody oppression.

... The time was when the Bonners and butchers rode over the faces of God's saints, and madefied (Madefy, to moisten, to make wet) the earth with their bloods, every drop whereof begot a new believer.

... This verse is like that sea (Mt 8:24) so tempestuous at first, that the vessel was covered with waves; but Christ's rebuke quieted all, and there followed a great calm. Here are cruel Nimrods riding over innocent heads, as they would over fallow lands; and dangerous passages through fire and water; but the storm is soon ended, or rather the passengers are landed. Thou broughtest us out into a wealthy place. So that this strain of David's music, or psalmody, consists of two notes - one mournful, the other mirthful; the one a touch of distress, the other of redress: which directs our course to an observation of misery and of mercy; of grievous misery, of gracious mercy. There is desolation and consolation in one verse: a deep dejection, as laid under the feet of beasts; a happy deliverance, broughtest us out into a wealthy place. In both these strains God hath his stroke; he is a principal in this concert. He is brought in for an actor, and for an author; and actor in the persecution, and author in the deliverance. Thou causest, etc; Thou broughtest, etc. In the one he is a causing worker; in the other a sole working cause. In the one he is joined with company: in the other he works alone. He hath a finger in the former; his whole hand is in the latter. We must begin with misery before we come to mercy. If there were no trouble, we should not know the worth of a deliverance. The passion of the saints is given, by the hearty and ponderous description, for very grievous; yet it is written in the forehead of the text, "The Lord caused it." Thou causest men to ride, etc. Hereupon, some wicked libertine may offer to rub his filthiness upon God's purity, and to plead an authentic derivation of all his villainy against the saints from the Lord's warrant: He caused it. We answer, to the justification of truth itself, that God doth ordain and order every persecution that striketh his children, without any allowance to the instrument that gives the blow. God works in the same action with others, not after the same manner. In the affliction of Job were three agents - God, Satan and the Sabeans. The devil works on his body, the Sabeans on his goods; yet Job confessed a third party: "The Lord gives, and the Lord takes away." Here oppressors trample on the godly, and God is said to cause it. He causeth affliction for trial (so Ps 66:10-11: Thou hast tried us, etc.); they work it for malice; neither can God be accused nor they excused.

... But thou broughtest us out into a wealthy place Every word is sweetly significant, and amplifies God's mercy to us. Four especially are remarkable:—
1. The deliverer

2. The deliverance

3. The delivered

4. Their felicity or blessed advancement.
So there is the deliverer, aliquid celsitudinis, Thou; in the delivery, certitudinis, broughtest out, in the delivered, solitudinis, us; in the happiness, plenitudinis, into a wealthy place. There is highness and lowness, sureness and fulness. The deliverer is great, the deliverance is certain, the distress grievous, the exaltation glorious. There is yet a first word, that like a key unlocks this golden gate of mercy, a veruntamen: BUT. This is vox respirationis, a gasp that fetcheth back again the very life of comfort. But thou broughtest, etc. We were fearfully endangered into the hands of our enemies; they rode and trod upon us, and drove us through hard perplexities. But thou, etc. If there had been a full point or period at our misery, if those gulfs of persecution had quite swallowed us, and all our light of comfort had been thus smothered and extinguished we might have cried, Periit spes nostra, yea, periit salus nostra - Our hope, our help is quite gone. He had mocked us that would have spoken, Be of good cheer. This same but is like a happy oar, that turns our vessel from the rocks of despair, and lands it at the haven of comfort.

13 You see all the parts of this song; the whole concert or harmony of all is praising God. You see quo loco, in his house; quo modo, with burnt offering; quo animo, paying our vows.

Burnt offerings For ourselves, be we sure that the best sacrifice we can give to God is obedience; not a dead beast but a living soul. The Lord takes not delight in the blood of brutish creatures. It is the mind, the life, the soul, the obedience, that he requires: 1Sa 15:22, "To obey is better than sacrifice." Let this be our burnt offering, our holocaust, a sanctified body and mind given up to the Lord, Ro 12:1-2. First, the heart: "My son, give me thy heart." Is not the heart enough? No, the hand also: Isa 1:16, Wash the hands from blood and pollution. Is not the hand enough? No, the foot also: "Remove thy foot from evil." Is not the foot enough? No, the lips also: "Guard the doors of thy mouth; " Ps 34:13, "Refrain thy tongue from evil." Is not thy tongue enough? No, the ear also: "Let him that hath ears to hear, hear." Is not the ear enough? No, the eye also: "Let thine eyes be towards the Lord." Is not all this sufficient? No, give body and spirit: 1Co 6:20, "Ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God's." When the eyes abhor lustful objects, the ear slanders, the foot erring paths, the hands wrong and violence, the tongue flattery and blasphemy, the heart pride and hypocrisy; this is thy holocaust, thy whole burnt offering.

As quoted in Spurgeon's Treasury of David