Titled "Morning Hymn" by Wesley, it is unusual in that it does not contain the customary reference to the previous night's rest or to the work and dangers of the day ahead. The text begins by placing the focus entirely on Christ, the "light of the world," the sun of Righteousness who rises with healing in his wings"; he is the "Dayspring" and "Daystar." Thus the "light of Christ" is to fill our lives and lead us forward "to the perfect day."
Bert Polman, Psalter Hymnal Handbook
The Catechism says that those who know Christ’s forgiveness are “to thank God for such deliverance” (Heidelberg Catechism, Lord’s Day 1, Question and Answer 2). As a result, “With our whole lives we may show that we are thankful to God for his benefits, so that he may be praised through us, and that we may be assured of our faith by its fruits, and so that by our godly living our neighbors may be won over to Christ” (Heidelberg Catechism, Lord’s Day 32, Question and Answer 86).