Romans 2:28 Meaning

26Therefore if the uncircumcision keep the righteousness of the law, shall not his uncircumcision be counted for circumcision?

27And shall not uncircumcision which is by nature, if it fulfil the law, judge thee, who by the letter and circumcision dost transgress the law?

28For he is not a Jew, which is one outwardly; neither is that circumcision, which is outward in the flesh:

29But he is a Jew, which is one inwardly; and circumcision is that of the heart, in the spirit, and not in the letter; whose praise is not of men, but of God.