How is a sense of continuity created through structure in ‘Climbing My Grandfather’?

We continue to 'climb' the grandfather, from the base to the head where the poet feels relief. The speaker will continually mention the grandfather's aging face and body 'wrinkles' and 'scars' as if they are crags and boulders on a mountain. The central motif continues throughout, creating a sense their relationship continues on despite age or death, as a mountain never dies.