Oaths, Vows, and Letting Your Yes Be Yes

Ryan and Brian reunite in person at "Bistro East" (Ryan's home in Indianapolis) to celebrate Ryan's 45th birthday and dive back into their ongoing Sermon on the Mount series. This episode covers Jesus' teaching on oaths and vows — what the Old Testament commanded, where things went wrong, and what Jesus calls his followers to instead.

In This Episode

• A birthday dinner recommendation: Bodhi Thai restaurant in Indianapolis (reservations required — book 7 days ahead!)
• Milestone: Episode 202 of the podcast
• Main text: Matthew 5:33–37 — Jesus on oaths and swearing

Key Scripture References

• Leviticus 19:12 — Do not swear falsely by God's name
• Numbers 30:1–2 — A man must fulfill every vow made to the Lord
• Deuteronomy 23 — Do not delay fulfilling a vow; silence is better than a broken promise
• Judges 11:29–31 — Jephthah's hasty vow and its tragic consequences
• Judges 21:1 — Israel's rash oath regarding Benjamin, leading to further tragedy
• Matthew 5:33–37 — Jesus: "Do not swear at all... let your yes be yes and your no be no"
• James 5 — "Let your yes be yes and your no be no" (parallel teaching from Jesus' brother)
• Matthew 23:16 — Jesus rebukes the Pharisees as "blind guides"
• Numbers 15:26 — Unintentional sins and forgiveness for the community

Main Takeaways

The Old Testament law was clear: if you make a vow, you must keep it. Breaking an oath meant profaning God's name and incurring serious consequences. But the stories of Jephthah and the tribe of Benjamin illustrate the danger of hasty vows — rushed promises that lead to devastating outcomes.

Jesus cuts through all of this with a radical simplification: don't swear at all. His point isn't legalistic — it's about the kind of people his followers should be. Kingdom people should have such consistent integrity that oaths become unnecessary. When your word is always good, there's no need to back it up with a sworn guarantee.

The deeper issue: swearing an oath implies your normal words can't be trusted. If your yes always means yes and your no always means no, the whole system of oath-taking becomes redundant.

Interesting Side Note: The Kol Nidre

Brian discusses the Kol Nidre, a prayer chanted at the opening of Yom Kippur (the Day of Atonement) in Jewish tradition. Rooted in Aramaic for "all vows," it essentially declares any inadvertent oaths made in the coming year null and void — a fascinating reflection of how seriously Jewish tradition has wrestled with the problem of broken vows.

Coming Up

Next, Ryan and Brian will continue in Matthew 5 with Jesus' teaching on turning the other cheek.

Find More Episodes & Series Visit the Bible Bistro website for full series archives including studies on Zechariah, Daniel, and more — useful for personal study, teaching, and preaching.