Lord, have mercy on my son: for he is lunatick, and sore vexed: for ofttimes he falleth into the fire, and oft into the water.

MATTHEW 17:15KJV
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What does Matthew 17:15 mean?

Matthew 17:15 records a father pleading with Jesus to help his son, who is suffering greatly and often falls into fire or water. The father describes his son as "lunatick" and "sore vexed," asking Jesus for mercy because the boy's condition is severe and dangerous.

In this scene, a desperate parent approaches Jesus directly, calling him "Lord" and begging for compassion. The language shows the seriousness of the boy’s suffering—he is in constant danger, and the father feels powerless. The verse highlights both the father’s faith in Jesus’ ability to help and the urgent need for relief from a condition that seems beyond human help.

The Greek behind Matthew 17:15

  • "Lord" (Κύριε, kurie): This word shows the father's respect and recognition of Jesus’ authority, addressing him not just as a teacher but as someone with power to act.
  • "Mercy" (ἐλέησον, eleēson): The Greek word means to show compassion or pity, emphasizing the father's hope that Jesus will respond with kindness to his son's suffering.
  • "Lunatick" (σεληνιάζεται, selēniazetai): This term literally refers to being "moonstruck" and was used in ancient times for conditions thought to be affected by the moon, often what we might now call epilepsy or severe seizures.
  • "Sore vexed" (κακῶς πάσχει, kakōs paschei): This phrase means to suffer badly or be greatly afflicted, underlining the seriousness of the boy’s condition.

Why Matthew 17:15 matters

  • The verse clarifies that the boy’s suffering was not just physical but also seen as mysterious or uncontrollable, which helps explain the father’s desperation.
  • The use of "lunatick" shows how people in that time understood certain illnesses, connecting the story to both ancient beliefs and the need for compassion regardless of the cause.
  • This plea for mercy sets up the following verses, where Jesus responds, and highlights the theme of faith and reliance on Jesus for help in situations that seem hopeless.

Where else these words appear

“lunatick” Greek G4583 · used in 2 verses

  • Matthew 4:24 And his fame went throughout all Syria: and they brought unto him all sick people that were taken with divers diseases and torments, and those which were possessed with devils, and those which were lunatick, and those that had the palsy; and he healed them.

“sore” Greek G2560 · used in 16 verses

  • Matthew 4:24 And his fame went throughout all Syria: and they brought unto him all sick people that were taken with divers diseases and torments, and those which were possessed with devils, and those which were lunatick, and those that had the palsy; and he healed them.
  • Matthew 21:41 They say unto him, He will miserably destroy those wicked men, and will let out his vineyard unto other husbandmen, which shall render him the fruits in their seasons.
  • Luke 5:31 And Jesus answering said unto them, They that are whole need not a physician; but they that are sick.

“ofttimes” Greek G4178 · used in 16 verses

  • Mark 5:4 Because that he had been often bound with fetters and chains, and the chains had been plucked asunder by him, and the fetters broken in pieces: neither could any man tame him.
  • 2 Corinthians 8:22 And we have sent with them our brother, whom we have oftentimes proved diligent in many things, but now much more diligent, upon the great confidence which I have in you.
  • 2 Timothy 1:16 The Lord give mercy unto the house of Onesiphorus; for he oft refreshed me, and was not ashamed of my chain:

“mercy” Greek G1653 · used in 28 verses

  • Matthew 5:7 Blessed are the merciful: for they shall obtain mercy.
  • Luke 16:24 And he cried and said, Father Abraham, have mercy on me, and send Lazarus, that he may dip the tip of his finger in water, and cool my tongue; for I am tormented in this flame.
  • Romans 11:32 For God hath concluded them all in unbelief, that he might have mercy upon all.