What are the motifs in To a Child Running With Outstretched Arms in Canyon de Chelly by N. Scott Momaday?

Freedom is a recurring idea in the poem. This poem starts by picturing the child making one of the most open and free gestures possible, running with outstretched arms. The gesture shows no fear nor restraint upon the child's unbridled excitement. However, the child is not presented as running in an open space but between the high stone walls of the canyon, an environment that might suggest confinement. What allows the Canyon de Chelly to represent freedom, not limitation, in this poem is the immensity mentioned in the fourth line.