The Faith that Saves is the Faith that Obeys
"Not everyone who says to Me, 'Lord, Lord,' will enter the kingdom of heaven; but he who does the will of My Father who is in heaven" (Matthew 7:21).
"And having been made perfect, He became to all those who obey Him the source of eternal salvation" (Hebrews 5:9).
"And why do you call Me, 'Lord, Lord,' and do not do what I say?" (Luke 6:46)
"Therefore, to one who knows the right thing to do, and does not do it, to him it is sin" (James 4:17).
"Now I make known to you, brethren, the gospel which I preached to you, which also you received, in which also you stand, by which also you are saved, if you hold fast the word which I preached to you, unless you believed in vain" (1 Corinthians 15:1,2).
"Therefore everyone who hears these words of Mine, and acts upon them, may be compared to a wise man, who built his house upon the rock. And the rain descended, and the floods came, and the winds blew, and burst against that house; and yet it did not fall, for it had been founded upon the rock. And everyone who hears these words of Mine, and does not act upon them, will be like a foolish man, who built his house upon the sand. And the rain descended, and the floods came, and the winds blew, and burst against that house; and it fell, and great was its fall" (Matthew 7:24-27).
"But prove yourselves doers of the word, and not merely hearers who delude themselves" (James 1:22).
"and to give relief to you who are afflicted and to us as well when the Lord Jesus shall be revealed from heaven with His mighty angels in flaming fire, dealing out retribution to those who do not know God and to those who do not obey the gospel of our Lord Jesus. And these will pay the penalty of eternal destruction, away from the presence of the Lord and from the glory of His power, when He comes to be glorified in His saints on that day, and to be marveled at among all who have believed-- for our testimony to you was believed" (2 Thessalonians 1:7-10).
"What use is it, my brethren, if a man says he has faith, but he has no works? Can that faith save him? If a brother or sister is without clothing and in need of daily food, and one of you says to them, 'Go in peace, be warmed and be filled,' and yet you do not give them what is necessary for their body, what use is that? Even so faith, if it has no works, is dead, being by itself.
"But someone may well say, 'You have faith, and I have works; show me your faith without the works, and I will show you my faith by my works.' You believe that God is one. You do well; the demons also believe, and shudder. But are you willing to recognize, you foolish fellow, that faith without works is useless? Was not Abraham our father justified by works, when he offered up Isaac his son on the altar? You see that faith was working with his works, and as a result of the works, faith was perfected; and the Scripture was fulfilled which says, 'And Abraham believed God, and it was reckoned to him as righteousness,' and he was called the friend of God. You see that a man is justified by works, and not by faith alone. And in the same way was not Rahab the harlot also justified by works, when she received the messengers and sent them out by another way? For just as the body without the spirit is dead, so also faith without works is dead" (James 2:14-26).
"Therefore, brethren, be all the more diligent to make certain about His calling and choosing you; for as long as you practice these things, you will never stumble; for in this way the entrance into the eternal kingdom of our Lord and Savior Jesus Christ will be abundantly supplied to you" (2 Peter 1:10,11).