Ask someone what "worship" means and you'll hear about singing, prayer, maybe a feeling of reverence. But in both Hebrew and Greek, the word is more physical than that. It means to bow down, to prostrate yourself — a visible, bodily act of submission and honor. Worship isn't primarily something you feel. It's something you do with your knees.
Jesus' definition of worship.
"The hour cometh, and now is, when the true worshippers shall worship the Father in spirit and in truth: for the Father seeketh such to worship him. God is a Spirit: and they that worship him must worship him in spirit and in truth" (John 4:23-24). Four times in two verses, Jesus uses the same Greek word — and it's the word for bowing low.
The Greek word: proskyneo.
The word Jesus used is προσκυνέω — proskyneo (Strong's G4352). It's a compound: pros, "toward," and kyneo, "to kiss" (related to kyon, "dog," as in kissing like a dog licks). The literal picture: to kiss toward someone, as a gesture of homage. But Thayer's gives the primary sense as "to prostrate oneself in homage, do reverence to, adore." In the ancient world, you proskynēsed a king by falling on your face before him.
The wise men did it when they found Jesus: "When they saw the young child with Mary his mother, they fell down, and worshipped him" (Matthew 2:11). The leper did it: "There came a leper and worshipped him, saying, Lord, if thou wilt, thou canst make me clean" (Matthew 8:2). The disciples did it after Jesus walked on water: "Then they that were in the ship came and worshipped him" (Matthew 14:33). Every time, the word is proskyneo — and every time, it's a physical act of bowing.
The Hebrew word: shachah.
The Old Testament's main word for worship is שָׁחָה — shachah (Strong's H7812). BDB (Brown-Driver-Briggs) defines it: "to bow down, prostrate oneself." It's the verb Abraham used when he told his servants, "I and the lad will go yonder and worship, and come again to you" (Genesis 22:5) — before he took Isaac up the mountain. It's what Moses did when God appeared at the burning bush: "Moses hid his face; for he was afraid to look upon God" (Exodus 3:6) — and Exodus 4:31 says the people "bowed their heads and worshipped." Same word.
Shachah appears over 170 times in the Old Testament. It's used for bowing to God, bowing to kings, even bowing in greeting or respect (Genesis 33:3, when Jacob bowed to Esau). The physical posture is always there — even when the reverence is spiritual, the body shows it.
When bowing becomes idolatry.
The second commandment doesn't say "Thou shalt have no other gods before me." It says "Thou shalt not make unto thee any graven image… Thou shalt not bow down thyself to them, nor serve them" (Exodus 20:4-5). The word is shachah. Idolatry isn't just wrong belief in your head — it's when you give the posture of worship to something that isn't God. That's why Daniel's friends wouldn't bow to Nebuchadnezzar's statue (Daniel 3:18), and why Mordecai wouldn't bow to Haman (Esther 3:2). Shachah was too loaded. It's the worship posture.
When worship is refused.
Here's where the New Testament gets sharp. When Satan tempts Jesus in the wilderness, he shows him all the kingdoms of the world and says, "All these things will I give thee, if thou wilt fall down and worship me" (Matthew 4:9). The word is proskyneo. Jesus answers, "Get thee hence, Satan: for it is written, Thou shalt worship the Lord thy God, and him only shalt thou serve" (Matthew 4:10, quoting Deuteronomy 6:13). Same word, same refusal. Proskyneo belongs to God alone.
And in Revelation, twice an angel stops John from bowing: "I fell at his feet to worship him. And he said unto me, See thou do it not: I am thy fellowservant… worship God" (Revelation 19:10, 22:9). Same word. Worship — the act of prostrate reverence — is reserved for God.
Worship in spirit and truth.
So when Jesus tells the woman at the well that true worshipers will proskyneo "in spirit and in truth," he's not saying the physical act doesn't matter. He's saying it's not about location — not Jerusalem, not Mount Gerizim. It's about the posture of the heart matching the posture of the body. You can bow without reverence (the Pharisees did it). And you can revere God without a temple. But proskyneo still means the whole self — body, spirit, truth — bowed before God.
What changes when you see it.
Read "worship" as "bow down" and dozens of verses sharpen. "All nations whom thou hast made shall come and worship before thee, O Lord" (Psalm 86:9) — they'll bow. "At the name of Jesus every knee should bow" (Philippians 2:10) — that's proskyneo made explicit. "Let us kneel before the LORD our maker" (Psalm 95:6) — that's the physical form of shachah. Worship is sung, yes. Worship is felt, yes. But worship, at its root, is the act of making yourself low before the Most High. The body knows what the words sometimes forget.
⚠️ How sure is this?
Scholarly consensus: Proskyneo (προσκυνέω, G4352) definitely means "to prostrate oneself in worship, do obeisance, show reverence by bowing" (BDAG, Thayer's, Abbott-Smith). Its use in the NT ranges from bowing to Jesus, to God, and (negatively) to Satan or idols. The "kiss toward" etymology (from kyon, dog) is ancient but disputed by some modern linguists; regardless, the attested meaning is clear. Shachah (שָׁחָה, H7812) means "to bow down, prostrate oneself" (BDB, HALOT), used for worship, respect, or homage. Both words describe a physical act of reverence, not merely an internal attitude. What's debated: whether NT worship requires literal physical prostration, or whether the language became somewhat metaphorical (internalized reverence). John 4:23-24 ("in spirit and truth") has been read both ways — as transcending physical posture, or as demanding heart-and-body alignment. Most scholars agree the words retain a strong physical component even when the theology expands beyond temple ritual. Avoid overreading the "kiss" etymology; focus on attested usage.