Jesus clearly stated that there is NONE GOOD but God.....God inspired the following thoughts and truths....
1. None Good...no not one<--Romans
2. All our righteousnesses are as filthy rags and our iniquities like the wind have taken us away<--Isaiah
3. If we say we have no SIN, we are deceived and the truth is not in us<--1st John
4. There is not a just man upon the earth that does good and sins not<--Ecclesiastes
Many godly men of the bible committed horrific sins and or sinned after being saved as the bible records...
1. David a man after God's own heart and mind committed adultery with Bathsheba and had her husband Uriah Killed
2. Peter lied three times when he denied the Lord and used foul language in the process, he also played the hypocrite when it came to socializing with the gentiles and then disassociating when the Jews came around.
3. Abraham was deceptive about his half sister wife to save his own skin
4. Daniel prayed and confessed his sins and associated himself with the sins of his people even though one sin is not recorded about him.
5. Paul towards the end of his life writes that he is the number one chief sinner among men.
6. Noah got rip roaring falling down blind drunk after the flood.
7. Thomas, after walking with the Lord for over three years and having the abilities to work miracles doubted the resurrection.
8. Solomon built temples and groves to idols because of the affiliation with his wives and concubines.
9. Peter was also called Satan once by Jesus for denying that Jesus had to die for the redemption of humanity.
Etc. At the end of the day the bible is clear.....the Pharisees bragged about their own righteousness, claimed how sinless they were and consistently pointed the finger at those around them while denying their own sin. Just because someone is saved does not mean that they will not in a moment of weakness sin....this does not mean that we cannot overcome particular sins and or cease from continual sin. You know....the man who will not even lift his eyes to heaven while beating on his chest and seeking forgiveness of sins is the one who walks away justified before God....not the one who brags and boasts of his righteousness, of being sinless and or makes claims to being righteous at the detriment of others.......
The statements below are applied unto particular sins of the flesh and not to the over all sinfulness of the flesh....
1. Go and sin no more
2. Those who have suffered in the flesh have ceased from sin
For there is NOT a just man upon the earth that does GOOD and SINS NOT<------when this was written there were saved men on the earth and this is as applicable unto them as much as it is applicable unto us!
The spirit that is born of God does NOT sin, is eternally saved, justified and sanctified in Christ positionally.
The flesh that the spirit is housed in is fallen, sinful and dead because of sin
Jesus said it best and proves the conflict that takes place within a true believer.......The Spirit is indeed willing, but the FLESH IS WEAK<----Paul expounds on this, although it is rejected by those who brag and boast of their own righteousness and lack of sin!