Now Jesus did not say that we must be born again and again and again. We are born into God's family once by faith, claiming Christ as our Saviour and Substitute, and we begin to trust in Him, and Him alone, to make us presentable to God the Father when we die. One of the things Paul warns the Galatians about is that they had originally understood salvation was by faith, but they started adding various works to make sure that they were saved. There is a place for good works in the Christian life, but it is very important where we position these good works. If we put them before we exercise faith in Christ, then we are working our way to heaven just like every other religion teaches.
Good works become the means of achieving salvation.
He let His only Son come and die for our sins. By choosing our good works as the means of our salvation we negate, nullify what Christ accomplished on the Cross. After our new, or spiritual birth. Good works are a sign of Christ's life within us. We do not perform them in order to remain in God's family.