Matthew 5:17 - What the Co-text Does to "Fulfil"

Matthew 5:17 — What the Co-text Does to "Fulfil"

Without the co-text, "fulfil" in verse 17 is easy to misread as "bring to completion and therefore make redundant" — in the same way a paid debt is fulfilled and no longer owed. Many people read it exactly that way: Jesus fulfilled the Law so we don't have to keep it. That reading makes verse 17 sound like a gentle way of saying the Law is finished.

The co-text (vv.18–20) makes that reading impossible.

• Verse 18 — "not an iota, not a dot, will pass from the Law until all is accomplished" — explicitly asserts the Law's ongoing validity down to its smallest detail.
• Verse 19 — warns against relaxing even the least of the commandments and teaching others to do the same.
• Verse 20 — raises the bar rather than lowering it: "unless your righteousness exceeds that of the scribes and Pharisees, you will never enter the kingdom of heaven."

The co-text rules out the "done away with" interpretation entirely. "Fulfil" here — the Greek πληρόω (plēroō) — means to fill to the full, to bring something to its complete and intended meaning. Jesus is not abolishing the Law; he is showing what it actually and fully requires, going deeper than the surface-level external compliance the Pharisees practiced.

What immediately follows (vv.21–48) confirms this — Jesus repeatedly says "You have heard it was said... but I say to you" and each time takes a commandment and reveals its deeper, fuller demand. The Law is not cancelled. Its full weight is exposed.

This is a clean example of co-text doing essential work. One verse read alone produces a wrong doctrine. Three verses of co-text correct it completely.