Psalm 121 meaning and explanation

Short answer

Psalm 121 is a song of trust for the journey: the psalmist's help comes not from the hills or anything created, but from the Lord who made heaven and earth. God is a Keeper who never sleeps, guards His people by day and by night, and keeps their whole life, now and for ever.

Psalm 121 is only eight verses long, yet it has comforted travelers, the sick and the sleepless for centuries. It begins with a question about where help comes from and answers it with one word repeated again and again: the Lord keeps. Here is what the psalm says, part by part.

A note on numbering: in Protestant and most modern Bibles this is Psalm 121. In the Orthodox tradition and in older Catholic Bibles, which follow the ancient Greek numbering, the same psalm is Psalm 120.

A song for the road

Psalm 121 is one of the Songs of Ascents, Psalms 120 to 134. Jamieson, Fausset and Brown explain that these songs were sung as worshipers went up to Jerusalem for the great feasts. The author and the occasion are unknown, as John MacArthur and Albert Barnes both say. Keil and Delitzsch note something else about the form: the thought moves upward step by step.

Matthew Henry mentions that some called it the soldier’s psalm and others the traveler’s psalm, and adds that it matters little which. Wherever we are, at home or on the road, we may take comfort in it.

I lift up my eyes to the hills

A Song of degrees. I will lift up mine eyes unto the hills, from whence cometh my help. My help cometh from the LORD, which made heaven and earth.
Ps 121:1–2 · King James Version (1769)

Barnes explains that the Hebrew is best read as a question: where does my help come from? It is the question of an anxious mind looking for help that cannot be seen. Commentators differ about the hills. Barnes thinks most likely of the hills of Jerusalem, where God’s house stood, and MacArthur of the hills a pilgrim sees on the way to the temple. William MacDonald explains it the same way: since God’s dwelling was on the hills of Jerusalem, looking there meant looking to the Lord. Henry reads the verse as a contrast instead. Shall I rely on the strength of the hills, on princes and great men? No, my confidence is in God alone (Jeremiah 3:23).

Either way, verse 2 gives the answer. MacArthur puts it simply: the psalmist looks for help not to the creation but to the Creator. Barnes draws the conclusion: “The Creator of all can defend all.”

He who keeps you will not sleep

He will not suffer thy foot to be moved: he that keepeth thee will not slumber. Behold, he that keepeth Israel shall neither slumber nor sleep.
Ps 121:3–4 · King James Version (1769)

From verse 3 the voice changes from “I” to “you.” Commentators hear different speakers. Barnes thinks the psalmist answers his own anxious question to his own soul. Jamieson, Fausset and Brown hear the Spirit speaking to Israel through the psalmist. MacDonald hears the Holy Spirit giving assurance to everyone who trusts the Lord.

A slip of the foot was a real danger on the hill roads of Israel, and Jamieson, Fausset and Brown take it as a picture of every sudden fall, outward or spiritual. God does not doze off on duty. MacArthur contrasts the living God with pagan idols, recalling how Elijah mocked the prophets of Baal and suggested their god was asleep (1 Kings 18:27). Barnes notes that a guard may nod at his post and a mother may fall asleep beside a sick child, but God is never weary or inattentive.

Jamieson, Fausset and Brown call the whole psalm a commentary on God’s promise to Jacob at Bethel that He would keep him wherever he went (Genesis 28:15).

The Lord is your shade

The LORD is thy keeper: the LORD is thy shade upon thy right hand. The sun shall not smite thee by day, nor the moon by night.
Ps 121:5–6 · King James Version (1769)

Shade was a natural picture for travelers under the burning Eastern sun, Jamieson, Fausset and Brown observe. The right hand, Barnes explains, was the place of a protector, near enough to step in at once. MacArthur adds that it stands for the place of human need.

The sun could strike a traveler down with heat. Commentators read the moon in different ways: Jamieson, Fausset and Brown think of the cold of the night, as Jacob suffered heat by day and frost by night (Genesis 31:40); others think of harm people believed the moon could cause. The point is plain either way: as MacArthur puts it, God’s protection lasts around the clock.

Your going out and your coming in

The LORD shall preserve thee from all evil: he shall preserve thy soul. The LORD shall preserve thy going out and thy coming in from this time forth, and even forevermore.
Ps 121:7–8 · King James Version (1769)

The promise now widens from particular dangers to all evil. Henry explains what this means in practice: “The Lord shall prevent the evil thou fearest, and sanctify, remove, or lighten the evil thou feelest.” He adds that God keeps the soul from being defiled by sin and from perishing for ever.

Going out and coming in, according to Keil and Delitzsch and Barnes, means all the business of life, at home and away (Deuteronomy 28:6). Henry applies it to the whole span of life: from going out to work in the morning of our days to coming home to rest in the evening of old age. MacArthur notes that the words all evil and for evermore point beyond this life to eternal life.

In Hebrew the word for keeping runs through the psalm six times. Jamieson, Fausset and Brown see in this repetition a sign of how slow our hearts are to believe it.

Does Psalm 121 promise that nothing bad will happen?

Psalm 121 is not a charm for travel or a guarantee against every accident. MacDonald writes that nothing can come into a believer’s life without God’s permission. God is not the author of sickness, suffering or death, but He rules over them and uses them for His purposes, and for those who love Him all things work together for good (Romans 8:28). Barnes says the same in other words: no evil that would endanger their salvation can befall God’s people.

So the psalm does not say that believers will never stumble, fall ill or grieve. It says that they are never unwatched and never left without a Keeper.

Praying Psalm 121

Look up, not around. When help seems far away, the psalm turns our eyes from people and circumstances to the Lord.
Remember who He is. The One who made heaven and earth is not short of ways to help.
Pray it on the way and at night. Many Christians read this psalm before a journey, and verses 3 and 4 are a natural prayer before sleep: you can rest because God does not need to.
Trust Him with your whole life. Your going out and coming in, today and for ever, are in His hands.