George Herbert's poems, "The alter" and "Easter wings" are examples of what kind of formal poem

The poem is a sample; of a genre poem, it can also be called a concrete or shape poem. This is because the poem has varied lines in each sentence that creates a visual shape and patterns of the poem. The essence of the poem becomes a representation of the poem on each page.

As the wings narrow and grow full, they reinforce the meaning of the poem through communication. For instance, every stanza narrows down, and the center of each verse defines the purpose of the poem.