The Response to Psalm 51 is from Hosea 6:6: "I desire steadfast love and not sacrifice." And the verse
continues: "...the knowledge of God rather than burnt offerings." The theme of all three readings is that God looks to the heart, not to external actions. What he wants from us is deep, enduring love and the desire to know him, not just "orthodoxy" or acts of religious observance, no matter how go...
The Responsorial Psalm is an invitation to wisdom: "I am the Lord your God: hear my voice" (Psalm 81).
Wisdom is defined as "taste for spiritual things" (cf. the Latin sapientia, sapor, and the English "savor"). All three readings are encouraging us to seek our well-being through relationship with God: hearing his voice as disciples and loving what we hear. This is wisdom.
The Responsorial Psalm is an unexpected response to the first reading. It urges us: "If today you hear his voice, harden not your hearts" (Psalm 95).
But in the first reading, God tells Jeremiah (7: 23-28) that when he commanded his people, "Listen to my voice. they obeyed not." Nor did they listen to the prophets. And he warns Jeremiah, "When you speak. they will not listen to you either!"