Psalm 86 (85 in the Septuagint and Vulgate numbering) is a heartfelt individual lament and prayer for help, traditionally attributed to David. It is one of the few psalms in Book III that bears a Davidic superscription. Scholars generally date it to the post-exilic period (5th–4th century BC), though it draws on earlier traditions. The psalm weaves together phrases from other parts of the Psalter, reflecting a deep familiarity with Israel’s prayer tradition. It blends petition with confident praise, characteristic of laments that move from distress to trust in God’s character. Its universal outlook—nations coming to worship—suggests a mature stage of Israel’s theology after the exile.

The selected verses (5-6, 9-10, 15-16a) with the response “O Lord, you are good and forgiving” highlight God’s merciful nature. The psalmist appeals to the Lord as good and forgiving, full of mercy to all who call upon Him, and pleads for an attentive ear to his prayer. He looks forward to the day when all nations will come, bow down, and glorify God’s name, recognising His greatness and marvellous deeds. The psalm recalls God’s self-revelation as compassionate, gracious, slow to anger, and abundant in mercy and fidelity, before asking Him to turn and take pity. This creates a movement from personal need to universal hope grounded in God’s steadfast character.

In the Lectionary, these verses are appointed as the Responsorial Psalm for the 16th Sunday in Ordinary Time, Year A. The readings focus on God’s patient mercy and the growth of His kingdom. The First Reading (Wisdom 12:13, 16-19) portrays God as a just and merciful ruler who gives repentance; the Second Reading (Romans 8:26-27) speaks of the Spirit helping us in weakness; and the Gospel (Matthew 13:24-43) presents the parables of the weeds among the wheat, the mustard seed, and the yeast—images of patient growth and the mysterious expansion of the Kingdom despite opposition.

Psalm 86 complements these readings beautifully. Its appeal to God’s forgiving mercy echoes the wisdom of allowing the weeds and wheat to grow together until harvest. The vision of all nations worshipping the one true God foreshadows the universal scope of the Kingdom proclaimed in the parables. For the assembly, the psalm strengthens hope amid the “ordinary” struggles of Christian life. It reminds believers that the same merciful Lord who is slow to anger and rich in fidelity continues to work patiently in the world and in the Church. The response “O Lord, you are good and forgiving” becomes a prayer of trust, inviting the faithful to call upon God with confidence while awaiting the full revelation of His Kingdom. In this way, the psalm turns the Sunday assembly into a foretaste of the universal praise it anticipates.