Ellicott's Commentary On The Whole Bible
Psalms 103 - Introduction
CIII.
This psalm has been compared to a stream which, as it flows, gradually acquires strength and volume till its waves of praise swell like those of the sea. The poet begins by invoking his own soul to show its gratitude for the Divine favour, and, by a highly artistic touch, makes the psalm, after rising to sublime heights, end with the same appeal to personal experience. But national mercies till much the larger space in his thought, and he speaks throughout as much in the person of the community as his own. Beyond one probable Aramaism in Psalms 103:3, and a possible dependence in one passage on the Book of Job (comp. Psalms 103:16 with Job 17:10), there is nothing to indicate the time of the psalm’s composition. The rhythm is varied, and the form irregular.