God is worthy of the most excellent kind of worship. In Psalm 100 we find a universal summons for all the earth to bring to God this most elevated and acceptable worship to Yahweh, our Maker, Sustainer and Redeemer. In this first study in Psalm 100, we look at the grounds for gratitude in worship, namely, creation, care and the cross. May the Lord purge any tinge of unbelief from our hearts and by His Holy Spirit enable us to be true worshippers who evermore come to Him with thankful hearts.