The first two clauses are parallels in portraying a supplicant before the king, requesting a benefit that the supplicant does not necessarily deserve but which the king has power to grant. Thus, the two first phrases emphasize the necessary attitude of humility.
The second clause of each couplet refers to the king: first, that he has the ability to grant the boon, and second, the supplicant’s right to request but also his or her need to continue pleading for that favor. The emphasis is still on the king and the king’s absolute right to grant that which is requested.