Final answer:
James Baldwin's usage of parallelism emphasizes the critical distinction between what matters in life and what does not, denouncing hatred as self-destructive.
Step-by-step explanation:
The use of parallelism in the excerpt from James Baldwin's "Notes of a Native Son" effectively supports the author's purpose by emphasizing the importance of holding on to the things that truly matter. Baldwin contrasts things that matter with things that do not, using parallel structure to reinforce this distinction and underscore the folly of bitterness. By stating that things such as the dead man, new life, and broader notions of humanity are what truly matter, as opposed to the divisiveness of 'blackness and whiteness', Baldwin underscores the destructive nature of hatred and the imperative to rise above it. This literary technique helps Baldwin deliver his message that succumbing to hatred leads to self-destruction, an 'immutable law' he wishes to communicate. Parallelism serves to clarify the author's beliefs and strengthen the moral he intends to convey.