These two neighboring psalms ask one question, what is within human power to accomplish? Psalm 126 remembers a national restoration nobody engineered. Psalm 127 says flatly that building, guarding, and rising early accomplish nothing without the LORD's hand behind them.
Psalm 126 opens with a wordplay that is easy to miss in translation. 1"When the LORD restored the fortunes of Zion" uses the same Hebrew root twice in a row, something close to "turned the turning," a doubled emphasis on reversal. The people who lived through it say 1"we were like those who dream." The joy was so sudden it felt unreal, and their mouths were full of laughter. Then the psalm turns that memory into a request. 4"Restore our fortunes, O LORD, like streams in the Negeb," the dry southern wadis that can fill in an afternoon after rain, a picture of reversal that comes all at once. The last verses promise it without a timetable. 5"Those who sow in tears shall reap with shouts of joy!" The seed sown in tears is still seed, even while it is buried and invisible.
Psalm 127 builds its case on a threefold "in vain." Unless the LORD builds the house, the builders labor in vain. 1"Unless the LORD watches over the city, the watchman stays awake in vain." The Hebrew for watchman is the same root Psalm 121 used of the LORD himself, the one who keeps you and will not slumber. Psalm 127 applies it to every merely human guard, whose watching accomplishes nothing without the greater, sleepless Keeper behind him.
Then comes verse 2, and its last clause completes the thought with tenderness. The bread of anxious toil is what we eat when we assume that results depend on the worker. Rising early and staying up late describe a posture more than a schedule, the quiet belief that the outcome is ours to secure. The cure is work that has stopped needing to guarantee its own results. He gives to his beloved sleep, and the reason is simple. The God who does not slumber is why his beloved can.
The second half turns from anxious labor to gift. 3"Children are a heritage from the LORD," a gift received from his hand. Even here the opening logic holds.
Put the two psalms next to Psalm 121 and the pattern is plain. God does not sleep, and so he can give sleep to those he loves. Whatever keeps you rehearsing a problem in the small hours is worth measuring against that fact. If the Keeper of Israel is awake so that you do not have to be, then lying awake over something you have already committed to him is worry wearing the costume of watchfulness.
If you are sowing in tears right now, in a relationship or a hope you have poured into for a long time, name it seed, buried now and harvested later. Then lie down, and let him be the one who stays awake.
Prayer
Father, unless you build our house we labor in vain, and unless you watch over what we love, our staying awake accomplishes nothing. Thank you that you give sleep to those you love, and forgive the nights we lay awake rehearsing what we had already handed to you. Whatever feels like sowing in tears, let us call it seed, and trust you to bring us home carrying sheaves. In Jesus' name, amen.