Praise differs from thanksgiving, which is offered for a specific reason or a particular gift. Praise does not depend on any single deed or gift of God. It is a prayer, chorus, or hymn directed to God out of endless wonder from our endless discovery of who God is.
Praise goes beyond thanksgiving to express our amazement at God’s concern for us that exceeds our expectation, merit, or imagination. Thus, praising God begins in surprise. God provides more. God is more than we had hoped or dared to imagine.
From: P. Joel Snider, The Upper Room Disciplines 2015: A Book of Daily Devotions, reading for June 3, 2015, p 166
(Check Discipleswalk.org for a some additional thoughts.)