The Lord’s gracious gifts are so great that the psalmist can do nothing to repay his debt. Keeping his promises publicly demonstrates his gratitude.
All he has done for the psalmist includes answers to prayer, rescue, and life.
The cup of salvation overflows with God’s blessings (Psalm 23:5), unlike the cup of judgment (75:8).
The psalmist makes vows (Psalm 116:18) to praise the Lord publicly (116:17–18).