He will not suffer thy foot to be moved - He will enable you to stand firm. You are safe in his protection. Compare the notes at Psalm 38:16. This, with the remainder of the psalm, seems to be of the nature of an answer to the anxious question in Psalm 121:1 - an answer which the author of the psalm, in danger and trouble, makes to his own soul, imparting confidence to himself.

He that keepeth thee will not slumber - He will be ever watchful and wakeful. Compare Isaiah 27:3. All creatures, as far as we know, sleep; God never sleeps. Compare Psalm 139:11-12. His eyes are upon us by day, and in the darkness of the night - the night literally; and also the night of calamity, woe, and sorrow.

He will not suffer thy foot to be moved - The foundation, God's infinite power and goodness, on which thou standest, cannot be moved; and whilst thou standest on this basis, thy foot cannot be moved.

He wilt not suffer thy foot to be moved,.... This is either an address of the psalmist to his own soul; or to any other good man, his friend and acquaintance, assuring of stability, and of final perseverance in grace to glory. The Lord keeps the feet of his saints from falling: he will not suffer them to be moved out of the spiritual estate in which they stand; nor off of the Foundation and Rock of ages, on which their feet are set, and their goings established; nor out of the house of God, where they are as pillars; nor out of his ways, where he upholds their goings; moved in some sense they may be, yet not "greatly moved"; their feet may be "almost" gone, and their steps "well nigh" slipped, and yet shall not fall finally and totally, or so as to perish; see Psalm 62:2;

he that keepeth thee will not slumber; neither angels nor men are the keepers of the saints, but the Lord himself; he is the keeper of every individual saint, of every regenerate person, of everyone of his sheep, of every member of his church; he keeps them by his power, he preserves them by his grace, he holds them with his right hand; guides them by his counsel, keeps their feet from falling, and brings them safe to glory: and a watchful keeper he is, he does not so much as slumber; he keeps them night and day, lest any harm them, Isaiah 27:3. Gussetius reads the whole as a prayer, "let him not suffer thy foot", &c. "let not thy keeper slumber" (i); to which the answer follows.

(i) "ne permittat--ne dormitet", Junius & Tremellius, Piscator; so Ainsworth.

He will not suffer thy foot to be moved: he that keepeth thee will not {b} slumber.

(b) He shows that God's providence not only watches over his Church in general, but also over every member of it.

3, 4. His sleepless vigilance is added.

to be moved-(Compare Ps 38:16; 66:9).

121:1-8 The safety of the godly. - We must not rely upon men and means, instruments and second causes. Shall I depend upon the strength of the hills? upon princes and great men? No; my confidence is in God only. Or, we must lift up our eyes above the hills; we must look to God who makes all earthly things to us what they are. We must see all our help in God; from him we must expect it, in his own way and time. This psalm teaches us to comfort ourselves in the Lord, when difficulties and dangers are greatest. It is almighty wisdom that contrives, and almighty power that works the safety of those that put themselves under God's protection. He is a wakeful, watchful Keeper; he is never weary; he not only does not sleep, but he does not so much as slumber. Under this shade they may sit with delight and assurance. He is always near his people for their protection and refreshment. The right hand is the working hand; let them but turn to their duty, and they shall find God ready to give them success. He will take care that his people shall not fall. Thou shalt not be hurt, neither by the open assaults, nor by the secret attempts of thine enemies. The Lord shall prevent the evil thou fearest, and sanctify, remove, or lighten the evil thou feelest. He will preserve the soul, that it be not defiled by sin, and disturbed by affliction; he will preserve it from perishing eternally. He will keep thee in life and death; going out to thy labour in the morning of thy days, and coming home to thy rest when the evening of old age calls thee in. It is a protection for life. The Spirit, who is their Preserver and Comforter, shall abide with them for ever. Let us be found in our work, assured that the blessings promised in this psalm are ours.