There was a child went forth every day,
And the first object he look'd upon, that object he became,
And that object became part of him for the day or a certain part of the day,
Or for many years or stretching cycles of years.
The early lilacs became part of this child,
And grass and white and red morning-glories, and white and red
clover, and the song of the phoebe-bird,
And the Third-month lambs and the sow's pink-faint litter, and  the mare's foal and the cow's calf,
And the noisy brood of the barnyard or by the mire of the pond-side,
And the fish suspending themselves so curiously below there, and the beautiful curious liquid,
And the water-plants with their graceful flat heads, all became part of him.
Here, Whitman employs his trademark literary device, anaphora, to further his imagery of young and mutable things. Like a child, all of these things are shaped by their experience and subsequent repetition of those experiences. 

There Was a Child Went Forth