Slight ambiguity to soften the death for the speaker it allows the speaker to converse with his son. Suggests the poem is about more than death, life, grieving, afterlife
AABBCCDDEEFF. Rhyming couplets could illustrate the parental son bond. The fluidity represents their strong relationship. The regular rhyming couples contrasts the irregular emotions he is feeling suggesting he is trying to control them
The idea that one should not mourn is depicted through the verb "lament," as death allows us to escape the pains of the body "flesh's rage", personnification