This question has been answered here many times. Here is a good response.
Mark 10 (live everlasting is salvation):
17 And when he was gone forth into the way, a certain man, running up and kneeling before him, asked him: Good Master, what shall I do that I may receive life everlasting?
18 And Jesus said to him: Why callest thou me good? None is good but one, that is God.
19 Thou knowest the commandments: Do not commit adultery, do not kill, do not steal, bear not false witness, do no fraud, honour thy father and mother.
20 But he answering, said to him: Master, all these things I have observed from my youth.
21 And Jesus, looking on him, loved him and said to him: One thing is wanting unto thee. Go, sell whatsoever thou hast and give to the poor: and thou shalt have treasure in heaven. And come, follow me.
22 Who being struck sad at that saying, went away sorrowful: for he had great possessions.
Turn to Scripture, of course :-)!
Neh. 13:14, Psalm 11:7,28:4, Isa. 3:10, 59:18, Jer. 25:14, 50:29, Ezek. 9:10, 11:21, 36:19, Hos. 4:9, 9:15, 12:2, Sir. 16:12,14 - The 2,000 year-old Catholic position on salvation is that we are saved by Jesus Christ and Him alone (cf. Acts 15:11; Eph. 2:5). But by the grace of Christ, we achieve the salvation God desires for us through perseverance in both faith and works. Many Protestants, on the other hand, believe that one just has to accept Jesus as personal Lord and Savior to be saved, and good works are not necessary (they just flow from those already saved). But these verses, and many others, teach us that our performance of good works is necessary for our salvation. Scripture also does not teach that good works distinguish those who are eternally saved from those who are not saved.
Sir. 35:19; Luke 23:41; John 3:19-21, Rom. 8:13, 2 Tim 4:14, Titus 3:8,14, Rev. 22:12 - these verses also teach us that we all will be judged by God according to our deeds. There is no distinction between the "saved" and the "unsaved."
1 Cor. 3:15 - if works are unnecessary for salvation as many Protestants believe, then why is a man saved (not just rewarded) through fire by a judgment of his works?