Romans 7:1-6 1 Or do you not know, brothers, (now I am speaking to those who know the law) that the law has dominion over a man only so long as he lives? 2 For example, a woman who is subject to a husband is obligated by the law while her husband lives. But when her husband has died, she is released from the law of her husband. 3 Therefore, while her husband lives, if she has been with another man, she should be called an adulteress. But when her husband has died, she is freed from the law of her husband, such that, if she has been with another man, she is not an adulteress. 4 And so, my brothers, you also have become dead to the law, through the body of Christ, so that you may be another one who has risen from the dead, in order that we may bear fruit for God. 5 For when we were in the flesh, the passions of sins, which were under the law, operated within our bodies, so as to bear fruit unto death. 6 But now we have been released from the law of death, by which we were being held, so that now we may serve with a renewed spirit, and not in the old way, by the letter.
As holy scripture says "faith without works is dead" (James 2:26) because it is unproductive producing no fruit (John 15:6) and so those who have faith without good works are in danger of being cut off from Christ (John 15:2). Saint Paul warns that faith that is unproductive is harmful.
Hebrews 5:11-6:8 11 Our message about him is great, and difficult to explain when speaking, because you have been made feeble when listening. 12 For even though it is the time when you ought to be teachers, you are still lacking, so that you must be taught the things that are the basic elements of the Word of God, and so you have been made like those who are in need of milk, and not of solid food. 13 For anyone who is still feeding on milk is still unskillful in the Word of Justice; for he is like an infant. 14 But solid food is for those who are mature, for those who, by practice, have sharpened their mind, so as to discern good from evil. 1 Therefore, interrupting an explanation of the basics of Christ, let us consider what is more advanced, not presenting again the fundamentals of repentance from dead works, and of faith toward God, 2 of the doctrine of baptism, and also of the imposition of hands, and of the resurrection of the dead, and of eternal judgment. 3 And we shall do this, if indeed God permits it. 4 For it is impossible for those who were once illuminated, and have even tasted of the heavenly gift, and have become sharers in the Holy Spirit, 5 who, despite having tasted the good Word of God and the virtues of the future age, have yet fallen away, 6 to be renewed again to penance, since they are crucifying again in themselves the Son of God and are still maintaining pretenses. 7 For the earth accepts a blessing from God, by drinking in the rain that often falls upon it, and by producing plants that are useful to those by whom it is cultivated. 8 But whatever brings forth thorns and briers is rejected, and is closest to what is accursed; their consummation is in combustion.