The answer is: Mercy

1 Chr 16:34; 2 Chr 5:13; 2 Chr 7:3; Ezra 3:11; Psalm 106:1; Psalm 107:1; Psalm 118:1; Psalm 118:29; Psalm 136:1; Jer 33:11

The phrase "O give thanks unto the Lord; for he is good: for his mercy endureth forever" shows up multiple times in Scripture, emphasizing a powerful sentiment that reverberates throughout the biblical narrative and resonates in hearts to this day. Have you noticed how mercy is often paired with goodness in the Bible? This combination paints a picture of a nurturing Creator, who doesn’t just take an interest in creation but is deeply involved, filled with compassion and kindness.

Interestingly, the link between mercy and thanksgiving runs deep, invoking thoughts on ancient Israel's festivals, where acts of gratitude were central to worship. Practitioners would echo these phrases as they celebrated communal feasts, affirming their unity under a benevolent God.

In Psalm 136, each line starts with a reminder of God's enduring mercy, creating a lyrical interplay of reason to give thanks. Whether recalling the incredible liberation from Egypt or enjoying the wonders of creation, these celebrations were more than about food; they were expressions of gratitude to a loving cosmic presence.

Another fun note—many liturgical traditions adopted this theme of mercy into their phrases, taking cues from their Jewish roots. It has shaped worship practices around the world, reminding communities to cherish the ongoing flow of kindness and love through their lives, even in the most ordinary of moments. So next time we express gratitude, let's remember – we do so in celebration of an unending landscape of mercy surrounding us.