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Mat. 5:33-37

Thou Shalt Not Forswear Thyself

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In this sermon, Pastor Albert N. Martin expounds Matthew 5:33-37, addressing the command "Thou shalt not forswear thyself." He clarifies the Mosaic teaching on oaths, exposes the scribes' and Pharisees' perversion of it, and then explains Christ's prohibition against casual oath-taking. Martin argues that Christ's teaching calls believers to such integrity in speech that their simple 'yes' and 'no' carry the weight of an oath, reflecting the truthfulness of God and the transformed heart of a Christian.

Primary Texts

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Matthew 5:33-37 This is the central text expounded, where Jesus addresses the command against forswearing oneself and teaches on the nature of oaths.

Outline 8 sections · 45 min

  1. Introduction: The Sermon on the Mount and the Law 0:03
  2. The Practical Importance of Speech 3:37
  3. Defining Oaths and Forswearing 8:05
  4. Moses' Teaching on Oaths 12:42
  5. The Scribes' and Pharisees' Perversion of the Law 19:48
  6. Christ's Teaching: Swear Not At All (Understanding the Prohibition) 25:57
  7. The Practical Solution: Let Your Yes Be Yes and Your No Be No 33:20
  8. Conclusion: The Heart of the Matter 40:43

Key Quotes

“Your mouth is the echo chamber of your heart.”
“If any man offend not in word, the same is a perfect man.”
“Well, the word forswear basically means to make an oath falsely or to lie in a statement that you ratify with an oath.”
“It was the same problem as with these other precepts they were clinging to a narrow interpretation of the letter which completely nullified the spirit of the thing.”
“We do this constantly. We take a specific precept of God that is an embodiment of a principle and God gives us that detailed precept as an illustration of a general principle and that principle is upon us in every circumstance but we just miss the principle and we take the specific precept and as long as we're keeping that our consciences are undisturbed.”
“Let your communication your conversation be yea yea and nay nay for whatsoever is more than these cometh of evil”
“You see the very fact that men ever had to take oaths is an indication that man's a fallen creature for if sin had never entered man would speak nothing but truth”
“Scripture tells us that all liars shall have their part in the lake which burneth with fire and brimstone”

Applications

Parents & families

  • As children and young people, live so that your parents never have to question if you are truly telling the truth; let your 'yes' mean 'yes'.

All listeners

  • Recognize the tremendous importance of your speech, as it reveals your heart and will be a basis for judgment.
  • Avoid reducing God's commands to mere checklists; seek to understand and apply the underlying principles, not just the letter of the law.
  • In all your speech, be perfectly candid and honest; let your 'yes' mean 'yes' and your 'no' mean 'no' without mental reservation.
  • Deliver yourselves from lying in the name of social politeness; strive for absolute honesty in social interactions.
  • In business ethics, social lives, and family lives, let your 'yes' mean 'yes' and your 'no' mean 'no' to build confidence in your word.
  • As parents, avoid taking casual 'oaths' or making threats you won't keep, as this undermines your children's respect and confidence in your word.
  • Cultivate frank, candid speaking as children of God, living in fellowship with the God of truth and indwelt by the Spirit of truth.
  • Allow the Spirit of God to make you true in the inward part, overcoming the natural disposition of lying.
  • Do not give yourselves over to the natural untruthfulness of the human heart, but experience divine grace that gives a desire for truth.
  • If called into court as a witness, do not feel disobedient to take an oath of honesty, as Christ's prohibition is against casual, not necessary, oaths.

A full transcript is available on the tab. 61 paragraphs, roughly 45 minutes.

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