Psalms 145:12 Commentary: Making God's Mighty Acts Known

Psalm 145 is the last of the alphabetic acrostic psalms, where each verse typically begins with a successive letter of the Hebrew alphabet (though the verse for nun is missing in the Masoretic text). The superscription calls it 'A Praise of David,' and Calvin calls it one of the most beautiful of his compositions. Ancient Jewish tradition held that whoever recites it three times daily is assured of a share in the world to come, a testament to its importance in synagogue worship.

Structurally, the psalm moves from personal praise (vv.1, 2) to a communal call (vv.3, 6) to a celebration of God’s character and kingdom (vv.7, 13). Verse 12 functions as the hinge: the saints speak of God's power and the glory of His kingdom 'to make known to the sons of men' what they themselves have experienced. The Cambridge Bible notes the awkward shift from second person ('your kingdom' in v.11) to third person ('his mighty acts'), a shift that the LXX smoothed out by reading the second person throughout. This may reflect a liturgical setting where the speaker turns from addressing God to addressing the congregation.

The phrase 'sons of men' (בְּנֵי אָדָם) is the standard Hebrew idiom for humanity in general, not just Israel. In the context of a psalm that celebrates God’s universal care (vv.9, 15, 16), the call to make known God's acts takes on a global scope. The kingdom language (מַלְכוּת) echoes the royal theology of Jerusalem, where God is King over Israel and, by extension, over all the earth. This anticipation of an everlasting kingdom (v.13) looks forward to the fulfilment that Christians see in Christ.

The supplied sources note two textual issues. First, the LXX (followed by the Vulgate and the Prayer Book Version) reads the second person in verse 12 ('that your power might be known'), smoothing the shift from second to third person that appears in the Hebrew. Second, the acrostic structure of the psalm lacks the expected verse for the letter nun (נ), a gap that some medieval manuscripts attempt to fill, but no early witness supports a replacement. Neither variant affects the core meaning of making God’s acts known.

Psalm 145 has been a staple of Jewish liturgy for centuries, recited three times daily in the prayer known as Ashrei, which begins with verses adapted from this psalm. Ancient rabbinic tradition declared that whoever utters this psalm with devotion is assured of a share in the world to come. Christian reception has often focused on the missionary implication of verse 12. Missionaries from the early church to the modern era have cited this verse as biblical warrant for global proclamation: the praise of the saints is meant to overflow into witness. In the Reformed tradition, Calvin drew on the psalm to teach that the knowledge of God’s providence and grace must be declared to others. The verse has been sung in hymns that celebrate the spread of God’s kingdom, though it is the psalm as a whole that shaped the doxological piety of both synagogue and church.

Three-point outline

1. The Content of the Message: The saints proclaim God’s mighty acts (גְּבוּרֹתָיו) and the glorious majesty of His kingdom. These are not abstract truths but concrete deeds of power in history, creation, exodus, deliverance, and ultimately the cross and resurrection.
2. The Audience of the Message: The 'sons of men', all humanity, not just the faithful. This verse breaks open the walls of the congregation and sends the praise outward. The missionary impulse is built into the structure of worship.
3. The Purpose of the Message: 'To make known.' This is not mere noise but intentional communication. The Hebrew verb (יָדַע) implies experiential knowledge: they are to come to know God personally, not just hear facts.

Five-point outline

1. The singer’s vow (vv.1, 2): 'I will extol you… I will bless your name.' Personal commitment to praise.
2. The unsearchable greatness (v.3): God’s greatness is beyond full comprehension, yet we are called to declare it.
3. The generational handoff (v.4): One generation praises to another, the chain of testimony.
4. The public proclamation (vv.5, 12): The saints speak of God’s glory and power so that outsiders may come to know Him.
5. The enduring kingdom (v.13): God’s reign stands forever, and this hope sustains the mission.

Illustration hooks

• Family dinner table: A child asks a parent why they pray before meals. The parent explains that God provides food, and that this is one of His mighty acts. The verse calls believers to be ready with such answers.
• A new neighbor moves in: A Christian family brings a meal and shares that they prayed for their new community. The neighbor later says, 'I don't know about God, but I see something different in you.' This is 'making known' through lived testimony.
• Cancer diagnosis: A believer tells a friend in the waiting room about God’s faithfulness through past trials. The friend, though not yet a believer, says, 'I want that kind of peace.' The 'mighty acts' here are not just miracles of healing but sustaining grace.

Questions your congregation is asking

• How do I talk about God without sounding pushy or religious? This verse gives permission: start with what He has done for you.
• Does my praise matter if I'm not a good speaker? Yes, the psalm says 'the saints speak' (plural). Sharing God's acts can be acts of service, not just words.
• Is it okay to share my faith with someone who might reject it? Verse 12 shows the goal is to 'make known,' not to convert. God handles the results; we are called to witness.

Psalm 145:12 calls believers to speak of God's mighty acts and the glory of His kingdom so that others may come to know Him. This small-group guide explores what that looks like in daily life.

Discussion questions

1. Read Psalm 145:10, 12. Who is speaking in these verses, and to whom are they speaking? Why does the pronoun shift from 'your' to 'his' in verse 12?
2. The Hebrew word for 'make known' (הוֹדִיעַ) comes from the root yada, meaning experiential knowledge. How is this different from simply telling someone a fact?
3. Barnes says this desire to make God known is 'the foundation of the Christian missionary desire.' Do you agree? When have you felt that longing for others to know God?
4. The 'sons of men' (v.12) refers to all humanity, not just believers. In what settings might you mention God's goodness to someone who doesn't yet follow Him?
5. Gill applies this verse to the ministry of the Word and to parents teaching children. Share a time you learned about God from someone older, or taught someone younger.
6. Verse 13 follows immediately with 'Your kingdom is an everlasting kingdom.' How does the permanence of God’s reign affect our confidence in sharing faith?
7. This psalm is structured as praise. How can a church that prioritizes worship also be a church that reaches out? Where do you see the two connected in your own life?