science

Now I Lay Me Down to Sleep

Now I Lay Me Down to Sleep is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Now I Lay Me Down to Sleep rather than just read about it. In short: Now I lay me down to sleep is a Christian children's bedtime prayer from the 18th century. Text Perhaps the earliest version was written by George Wheler in his 1698 book The Protestant Monastery, which reads: Upon lying down, and going to sleep.

Key takeaways

Now I Lay Me Down to Sleep belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Now I Lay Me Down to Sleep to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Now I Lay Me Down to Sleep from memory before moving on to harder problems.

Reference excerpt

Now I lay me down to sleep is a Christian children's bedtime prayer from the 18th century.

Text Perhaps the earliest version was written by George Wheler in his 1698 book The Protestant Monastery, which reads:

Upon lying down, and going to sleep.

A later version printed in The New England Primer goes:

Other versions

Grace Bridges, 1932:

It is sometimes combined with the "Black Paternoster", one version of which goes:

Sometimes the prayer ends with, “and this I ask for Jesus’ sake. Amen.”

In popular culture

In Wes Craven's A Nightmare on Elm Street, the film's protagonist, Nancy Thompson, recites the prayer before entering the dream world to confront Freddy Krueger. In The Simpsons episode "Lisa's First Word", Bart imagines the headboard on his clown bed reciting a line of the prayer, specifically "If you should die before you wake." American heavy metal band Metallica uses the whole prayer in their hit song "Enter Sandman" from their 1991 album Metallica. Rapper Snoop Dogg uses The New England Primer version in the bridge after the second verse of his song "Murder Was The Case" from his 1993 album Doggystyle. American heavy metal band Megadeth uses the whole prayer in their song "Go to hell" from their 1995 compilation Hidden Treasures. The Finnish gothic rock group HIM incorporates a modified version of the prayer in their song from 2003, Buried Alive by Love. Rapper Kendrick Lamar includes two modified lines of the prayer to his song "Alien Girl (Today W/ Her)" from his 2010 mixtape, "O(verly) D(edicated)". Rapper JPEGMafia uses lines from this prayer in the chorus of his song "the 27 club" from his 2016 album Black Ben Carson. Art Garfunkel performed the song live during his 2016–2020 In Close-Up tour as the encore song. XXXTentacion incorporates a modified version of the first two lines of this prayer in the closer of his ? album, "Before I Close My Eyes". Singer Halsey uses The New England Primer version of the prayer in the intro portion of their 2019 single "Nightmare". Rapper JID takes from the first two lines and incorporates them into the first verse of "Kody Blu 31" from his 2022 album The Forever Story. Belgian hardcore DJ DRS uses this prayer in the introduction of his Thunderdome set in 2022. Singer Kid Cudi uses part of The New England Primer version in his A Kid Named Cudi album song "The Prayer". Canadian singer the Weeknd references this prayer in his song "Big Sleep" from his 2025 album Hurry Up Tomorrow, where featured artist Giorgio Moroder recites the lines "Now I lay me down to sleep, pray the Lord my soul to keep, angels watch me through the night, wake me up with light" in the second verse.

See also Christian child's prayer – Easily memorable prayers recited by children Adon Olam - a Jewish prayer bearing some similarities

References

Worked examples

Example 1 — a first encounter with Now I Lay Me Down to Sleep

Start with the simplest possible case. Write down what Now I Lay Me Down to Sleep claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Now I Lay Me Down to Sleep before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Now I Lay Me Down to Sleep ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Now I Lay Me Down to Sleep

In research: Now I Lay Me Down to Sleep appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Now I Lay Me Down to Sleep in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Now I Lay Me Down to Sleep is common in secondary-school and first-year university syllabi. It links to neighbouring topics Christian prayer, Christianity and children, Sleep, so understanding it makes those chapters shorter.
In everyday life: Look for Now I Lay Me Down to Sleep outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Now I Lay Me Down to Sleep in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Now I Lay Me Down to Sleep means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Now I Lay Me Down to Sleep out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Now I Lay Me Down to Sleep in simple terms?

Now I lay me down to sleep is a Christian children's bedtime prayer from the 18th century. Text Perhaps the earliest version was written by George Wheler in his 1698 book The Protestant Monastery, which reads: Upon lying down, and going to sleep.

Why does Now I Lay Me Down to Sleep matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Now I Lay Me Down to Sleep?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Now I Lay Me Down to Sleep.