While there are many in the evangelical world today who claim that salvation is only by faith, the Bible clearly teaches that salvation involves good works and that they are necessary to experience eternal life. Justification is by faith alone, but salvation, taken as a whole, is by faithfulness. Zane Hodges, Charles Ryrie, Charles Stanley and other no-Lordship proponents claim that a person's heavenly inheritance is secure based on a decision that the person made at some point in his past without respect to whether or not the person is presently living a godly life.
Contrary to that antinomian (against the law) vision of Christianity, Christ teaches that the only one who will enter the kingdom of heaven is "the one who does the will of my Father who is in heaven" (Matthew 7:23). And, God's "will" is not limited to "faith alone," but includes faith, repentance, love, and good works of faithful obedience to God's law. Mark 13:13 says, "The one who endures to the end will be saved." Christ said that the man whose house stands is the one who "hears my words and does them" (Luke 6:46). In context, this "doing" of Christ's words cannot be reduced to the act of "faith alone," but includes a robust godliness (Luke 6:20-45). Christ very pointedly told the disciples "If you keep my commandments, you will abide in my love" (John 15:10).
The epistles are full of such admonition. 1 Corinthians 10:12 says, "Therefore, let anyone who thinks that he stands, take heed lest he fall." Then again in 1 Corinthians 6:9-11, "Do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived: neither the sexually immoral, nor idolaters, nor adulterers, nor men who practice homosexuality, nor thieves, nor the greedy, nor drunkards, nor revilers, nor swindlers will inherit the kingdom of God." 2 Corinthians 5:10 says, "For we must all appear before the judgment seat of Christ, so that each one may receive what is due for what he has done in the body, whether good or evil." In Galatians, Paul warns us, "For in Christ Jesus, neither circumcision nor uncircumcision counts for anything, but only faith working through love" (Galatians 5:6). Later in the same letter, Paul wrote, "For the one who sows to his own flesh, will from the flesh reap corruption, but the one who sows to the Spirit will from the Spirit reap eternal life" (Galatians 6:8).
In the book of Hebrews, we find many warnings that teach us of the necessity of perseverance for the experience of eternal live. "For we share in Christ, if we hold fast our original confidence firm to the end" (Hebrews 3:14). "Therefore, while the promise of entering his rest still stands, let us fear, lest any of you should seem to have failed to reach it" (Hebrews 4:1). "Let us therefore strive to enter that rest, so that no one may fall by the same sort of disobedience" (Hebrews 4:11). "And being made perfect, he became the source of eternal salvation to all who obey him" (Hebrews 5:9). "For if we go on sinning deliberately after receiving the knowledge of the truth, there no longer remains a sacrifice for our sins but a fearful expectation of judgment and a fury of fire that will consume the adversaries" (Hebrews 10:26). "Strive for peace with everyone, and for the holiness without which no one will see the Lord" (Hebrews 12:14).
The book of Revelation too, warns us that we must be overcomers in order to inherit the promised future blessing. "To the one who conquers, I will grant to eat of the tree of life, which is in the paradise of God" (Revelation 2:7). "Be faithful unto death, and I will give you the crown of life" (Revelation 2:10). "The one who conquers, I will grant to sit with my on my throne, as I also conquered and sat down with my Father on his throne" (Revelation 3:21).
Finally, "The one who conquers will have this heritage, and I will be his God and he will be my son, but as for the cowardly, the faithless, the detestable, as for murderers, the sexually immoral, sorcerers, idolaters, and all liars, their portion will be in the lake that burns with fire and sulfur, which is the second death" (Revelation 21:7-8).