Answer:
This poem shows the problem of how African Americans were treated and Cullen's comment is that he does not lose hope, that this will change.
Explanation:
Cullen reflects on these lines that African Americans are somehow oppressed by whites. "We shall not always plant while others reap", "Not always bend to some more subtle brute".
This problem will come to an end, since they will not wait forever or continue to suffer.
"We were not made to eternally weep.", "So in the dark we hide the heart that bleeds, Â And wait, and tend our agonizing seeds. "
Here it is shown how Cullen transmits hope in his words, showing that they will wait, since they will not suffer forever.