1 John 3:9 says:
“No one who is born of God will continue to sin, because God’s seed remains in them; they cannot go on sinning, because they have been born of God.” (NIV)
The KJV says ‘cannot sin’ whereas Greek Experts (and most modern translations and commentators) tell us that it should be translated ‘cannot continue sinning’, which presumably means Christians might fall into sin, but they'll always repent, having been convicted by God of their sins, hence they won't continue living in sin.
1 Corin 11: 28-32 says:
“28 Everyone ought to examine themselves before they eat of the bread and drink from the cup. 29 For those who eat and drink without discerning the body of Christ eat and drink judgment on themselves.30 That is why many among you are weak and sick, and a number of you have fallen asleep. 31 But if we were more discerning with regard to ourselves, we would not come under such judgment. 32 Nevertheless, when we are judged in this way by the Lord, we are being disciplined so that we will not be finally condemned with the world.” (NIV)
These verses appear to say that some Christians continue in wilful (or maybe inadvertent) continual sin and because they don’t judge themselves and turn from sin, God judges them with sickness and possibly even brings them home earlier than they ought to go so that they won’t be condemned with the world (incidentally I’m not saying that all sickness is due to personal sin).
How can the apostle John say that those who are born again cannot continue in sin, yet the apostle Paul says that some Christians do lead lives of continual sin which grieves the Lord and requires Him to judge them?