Is this relating to drugs or is this a legit question ? XD
Answer: The couplet allows for parallel form connecting the elements of thought.
Here are the connections:
God directs - from his head
guard him from on high- let ev'ry evil fly
Chavez's ultimate goal was "to overthrow a farm labor system in this nation which treats farm workers as if they were not important human beings.1962, he founded the National Farm Workers Association (NFWA), which would form the backbone of his labor campaigns. Chavez wanted the dignity and rights of farm workers to be respected.