What is one reason steinbeck uses parallelism in the grapes of wrath?

After reading this excerpt, darren makes a text-to-text connection. which example is a text-to-text connection?

Explain what john proctor meant here! then who will judge me? god in heaven, what is john proctor what is john proctor? i think it is honest, i think so, i am no saint let rebecca go like a "

Simple subject mary will start the race in ten minutes