To let those who have been given knowledge know that it is the truth from your Lord, and they will acknowledge it, and their hearts will soften to it. God will guide those who acknowledge to a straight path.
Translation endnotes
[22:52-55] The weakness and deficiencies demonstrated by messengers and prophets provide excuses for those who try to criticize them and reject their message. On the other hand, those deficiencies and weaknesses reject the common Sunni and Shiite belief that the messengers are "innocent" or "sinless" people. Those who acknowledge and appreciate God's message are capable of distinguishing revelation from personal errors.