Sermon on the Mount: Week 7 - Blessed are the Pure in Heart

Sermon #
7
in the series
Pastor Kirsten’s sermon on Matthew 5:8 teaches that purity of heart—an undivided, sincere devotion to God shaped by His transforming work—enables believers to truly see and experience Him now and for eternity.

Blessed are the Pure in Heart (Matthew 5:8)

The Heart That Sees”

1. Introduction – Setting the Scene

Main Verse: Matthew 5:1–10 (focus on v.8)

  • The Good News: The long-awaited kingdom of God had begun to break into the world. The reign of heaven had started to break in upon the earth!
  • To repent = to think again, think anew, or turn around
  • Darrell Johnson – “The clearest sign that human beings are in fact ‘turning around and believing’ [the Good News] is that they are becoming ‘Beatitude people.’”
  • Each Beatitude focuses on the qualities or characteristics that all of Jesus’ followers will experience, they’re not describing eight different people.
  • They show the “norms” of life in God’s Kingdom — both present blessings and future hope.
  • Each Beatitude builds on the previous; purity of heart grows out of dependence on God, mourning over sin, meekness, hunger for righteousness, and mercy.

2. Understanding “Pure in Heart” - Three Aspects:

  • Main Verse: Matthew 5:8 – “Blessed are the pure in heart, for they will see God.”

A. Our Hearts Are Unmixed at the Centre of Who We Are

  • Heart = the core of our being — where thoughts, feelings, and decisions flow from.
  • A pure heart is unmixed at the center of who we are.
  • Purity = unmixed devotion to God (James 4:8; Matthew 6:21).
  • Divided loyalty between God and the world blocks purity.
  • What we treasure reveals our heart’s focus.
  • Ask: “What do I love most? What holds my ultimate allegiance?”

B. Not Perfect People, but People of Integrity

  • J.B. Phillips – “Blessed are the utterly sincere.”
  • God desires integrity: same person inside and out, in public and private (1 Thessalonians 2:4; Jeremiah 17:10; 1 Samuel 16:7)
  • God sees the motives of our hearts, not just outward actions.
  • Pretending to be perfect prevents authenticity before God.
  • Ask: “Are my action and words accurate reflections of what is in my heart? Am I covering up what’s in my heart?”

C. Allowing God to Search Us and Transform Us

  • Psalm 139:23–24; Ezekiel 11:19; 1 Thessalonians 3:13
  • Invite God to reveal hidden motives.
  • Johnson – “The pure in heart open up the whole of life to God’s searching, cleansing, healing light.”
  • Transformation is God’s work through His Spirit.
  • Peter Kreeft – “We attain purity of heart… by the incorporation into Christ.”
  • Purity flows from being united with Christ.

3. The Promise – “They Will See God”

  • Psalm 27:8; Deuteronomy 4:29; 1 Peter 1:8–9; Colossians 1:15; John 12:44–46
  • Don Carson – “Our perception of God… depends on our purity of heart.”
  • God’s presence isn’t always experienced as we expect; He reveals Himself in His timing and ways.
  • Look to Jesus!
  • Darrell Johnson – “In Jesus of Nazareth, infinitude is focused… the face of the Living God is made manifest.”
  • Final fulfillment: seeing God face-to-face in eternity.
  • Present reality: glimpses of God through Scripture, creation, His people, and the Spirit’s presence.
  • Jesus reveals the Father — to see Him is to see God, He’s “the visible image of the invisible God.”

4. Application & Call to Response

  • Psalm 139:23–24
  • Fix your heart’s devotion on God alone.
  • Live with integrity — authentic before God and people.
  • Invite God to search and purify your heart daily.
  • Blessed are the pure in heart, for they will see God.” – Jesus (Matt. 5:8)
  • Purity of heart is God’s transforming gift, not our self-made achievement.
  • Choose daily to look to Jesus and be captivated by Him.