Matthew 6:16-18: Jesus Teaches Us How To Fast

How to Use This Commentary

Matthew 6:16–18 completes Jesus’ teaching on practicing righteousness before the Father—covering giving, prayer, and now fasting.

Read it in two movements: (1) the danger of hypocritical fasting, and (2) the call to sincere, God-centered fasting.

Key: Fasting is not about appearing spiritual—it is about seeking God.

You can deny yourself… and still be full of yourself.

You can skip meals…
look serious…
appear deeply spiritual…

👉 and still miss God entirely.

That’s what Jesus confronts here.

Not fasting itself—
but fasting for attention.

👉 Turning devotion into performance.

A Quick Look: Matthew 6:16–18

Big idea: True fasting is done for God, not for public recognition.

Why this matters: Even spiritual disciplines can become self-centered if our motives are wrong.

Key truth: God rewards what is done in secret, not what is displayed for others.

Bottom line: Fasting is not about being seen—it is about seeking the Father.


A Simple Explanation (Matthew 6:16–18)

“When you fast…” (v.16)
Jesus assumes fasting will happen.
Meaning: Fasting is a normal, though not commanded, spiritual practice.
Application: There are seasons where denying yourself helps you seek God.

“Do not look gloomy…”
Jesus exposes hypocrisy.
Meaning: Some people made fasting obvious to gain attention.
Application: Don’t turn devotion into a performance.

“They have their reward…”
Jesus gives the result.
Meaning: Human attention is the only reward they receive.
Application: If you fast for others, that’s all you get.

“Anoint your head and wash your face…” (v.17)
Jesus gives a contrast.
Meaning: Maintain normal appearance.
Application: Don’t draw attention to your sacrifice.

“Your Father who sees in secret…” (v.18)
This reveals God’s role.
Meaning: God sees what others don’t.
Application: Live for God’s reward, not people’s praise.

Bridge: Like giving and prayer, fasting is about motive—not just action.

👉 For more on prayer (the section right before this), see:
Jesus Teaches Us How to Pray

👉 Explore all Matthew resources here:
Matthew Hub


A Deeper Dive: Fasting That Seeks God

1) The Third Spiritual Practice

Jesus addresses three acts of righteousness: giving (6:1–4), prayer (6:5–15), and fasting (6:16–18).

In all three, the issue is the same:

👉 Are you doing this for God—or for people?

2) What Is Fasting?

Biblically, fasting is voluntarily abstaining from food for a spiritual purpose.

Key insight: Fasting has no value in itself—it only has value when connected to seeking God.

3) Fasting Is Not Commanded—But Expected

Jesus says “when you fast,” not “if.”

Insight: Fasting is assumed in the life of a disciple, but not required or ritualized.

4) The Danger: Performative Fasting

The Pharisees made fasting visible:

  • Gloomy expressions
  • Disheveled appearance
  • Public visibility

👉 Their goal was attention, not devotion.

Insight: When the heart is wrong, fasting becomes a spiritual performance.

5) The Reward Principle (Again)

Jesus repeats a familiar warning:

👉 “They have their reward in full.”

Insight: Public recognition replaces eternal reward.

6) The Right Approach: Normal Appearance

Jesus commands:

  • Anoint your head
  • Wash your face

👉 In other words: look normal.

Insight: True fasting avoids drawing attention—even subtly.

7) The Purpose of Fasting

Scripture shows fasting connected to:

  • Grief and mourning
  • Repentance
  • Seeking guidance
  • Intense prayer
  • Dependence on God

Insight: Fasting is not about gaining power—it is about expressing dependence.

8) Fasting Always Accompanies Prayer

You can pray without fasting—but you cannot fast biblically without prayer.

Insight: Fasting intensifies prayer—it does not replace it.

9) Fasting and the Heart

God rejects fasting that is disconnected from obedience.

The prophets made this clear:

👉 External fasting without internal repentance is meaningless.

Insight: God cares more about a surrendered heart than a starving body.

10) The Father Who Sees

Once again, Jesus emphasizes:

👉 “Your Father who sees in secret”

Insight: God sees motives, not just actions—and He rewards accordingly.

11) The Gospel Connection

Fasting exposes something deep:

👉 We want recognition—even in our sacrifice.

But in Christ:

  • You are already seen by the Father
  • You are already accepted
  • You don’t need to prove your devotion

Jesus fasted perfectly—not for attention, but in obedience.

And through Him:

  • Your motives are forgiven
  • Your heart is reshaped
  • Your devotion becomes genuine
Deep Dive Summary:
  • Fasting is a voluntary spiritual discipline
  • Its value comes from seeking God, not denying food
  • Hypocritical fasting seeks attention
  • True fasting avoids recognition
  • Fasting intensifies prayer and dependence
  • God rewards what is done in secret

Bottom Line (Matthew 6:16–18)

Fasting is not about being noticed—it is about seeking the Father with sincerity, humility, and dependence.


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