This depends on what God says at the time. This is why Paul uses the term "from faith to faith".
For Israel to be faithful, they were to keep the law. The body of Christ is different, we are not under the law.
Have you ever thought why Jesus said He was sent for the Jews?
It is because Jews were supposed to be God's people, yet they were so disobedient to God.
So Jesus was sent to reeducate them to be right with God.
It is essential to be faithful to God and Jesus to inherit the kingdom.