“Do not swear at all… let your Yes be Yes”
Matthew 5:34–37
Cultural referenceSettledJesus
But I tell you not to swear at all: either by heaven, for it is God's throne; or by the earth, for it is His footstool… Simply let your 'Yes' be 'Yes,' and your 'No,' 'No.' Anything more comes from the evil one. (Matthew 5:34–37 BSB)
What it sounds like today
A blanket rule against formal oaths (courtroom swearing, perhaps).
The cultural key
First-century oath culture ranked vows by what you swore on: swearing 'by heaven' or 'by Jerusalem' was widely treated as less binding than swearing by God's name: a system of graded loopholes (Jesus skewers it directly in Matthew 23:16–22: 'If anyone swears by the temple, it is nothing, but if anyone swears by the gold of the temple, he is bound'). Each 'lesser' object, Jesus notes, belongs to God anyway.
Recovered meaning
The loophole ladder is abolished because every rung lands on God. People of plain integrity need no escalating guarantees; a bare yes or no should be oath enough.
Parallels: James 5:12