In King's Letter, identify parallelism in the paragraph beginning "If i Have said anything in this letter that is an overstatement...."

The quote reads:

If I have said anything in this letter that overstates the truth and indicates an unreasonable impatience, I beg you to forgive me. If I have said anything that understates the truth and indicates my having a patience that allows me to settle for anything less than brotherhood, I beg God to forgive me.

Note that King uses an apologetic tone which actually works, rhetorically, to highlight the importance of his arguments in the letter as a whole. He rhetorically asks the reader to reflect upon the essence of his letter.