Let the Redeemed of the Lord Say So
As the people of God we should be known as people of gratitude. As those who have been redeemed and adopted into the family of God we should never be shy to proclaim our thanks to God, whether in prayer or in daily conversation.
In Psalm 107 the primary theme is that the redeemed of God should proclaim what they have received. As those who have been delivered we should be people of thanksgiving and praise to God.