How do the authors of A Psalm of Life and Auspex use different images to illustrate their themes?

In "A Psalm of Life," Henry Wadsworth Longfellow employs vibrant imagery of nature and action, such as the metaphor of life as a battlefield, to convey themes of perseverance and the importance of living fully. In contrast, "Auspex" by John Greenleaf Whittier uses more introspective and somber imagery, like the metaphor of birds and their fleeting songs, to reflect on the transient nature of life and the inevitability of loss. These differing images highlight the former's call to embrace life's challenges versus the latter's contemplation of mortality and memory.