english composition Q1

In the last two lines of the poem, the poet tells us how he feels about his relationship with his father. How does the poet structure this poem so that the last two lines accomplish this?  The poet structures his poem so that the last two lines explain how he feels about his relationship with his father. He realizes that, when he was young, he didn’t understand how much his father loved him, and he regrets this. 

Those Winter Sundays by Robert Hayden | Poetry Foundation
https://www.poetryfoundation.org/poems/46461/those-winter-sundays