When people want to reject salvation by faith in Christ alone that the Bible describes, they usually only have a few responses.
One of the most common objections to Christianity goes something like this: "Well if it's faith alone then I can just go around killing people and still be saved." Or sometimes they phrase it like this: "So a mass murderer can just kill a bunch of people and still be saved if he just believes?"
It is such an obvious cope by bringing up hypothetical unrealistic extremes, and demonstrates a profound ignorance (intentional?) of Christianity. Do you know any mass murderers that profess Christianity? Does this happen all the time? Ever?
The more honest and realistic question that you should be asking is, "Am I still saved if I lie, steal, blaspheme, & covet?" The answer is a resounding and unequivocal "YES." Most likely you WILL do those things and much more, but where sin abounds grace abounds even more. Jesus is greater than your sin, and even Paul who was given an abundance of grace still struggled with sin (Romans 7). Don't diminish the amazing work of Christ by thinking you can "out-sin" His love and atoning sacrifice.
"For whosoever shall keep the whole law, and yet offend in one point, he is guilty of all." -- James 2:10
People also need to be aware of how high Jesus set the bar when it came to sin, to show how impossible it is to be righteous in yourself. Matthew 5:28 reads, "But I say unto you, That whosoever looketh on a woman to lust after her hath committed adultery with her already in his heart."
Did you know you are almost certainly guilty of adultery according to Jesus?
Jesus said the same regarding murder in verses 21-22 of the same chapter, "Ye have heard that it was said of them of old time, Thou shalt not kill; and whosoever shall kill shall be in danger of the judgment: But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire."
Did you know you are almost certainly guilty of murder according to Jesus?
I've never heard a Christian suggest other believers go out and commit atrocities, and the Bible is quite clear about loving others and doing good. However, many people can't seem to separate salvation from that which we should do after being saved.
There are many commands given to believers in the Bible for things that we should do. But when we fail to do them it does not remove our salvation. We are eternally secure in Christ.
"What then? shall we sin, because we are not under the law, but under grace? God forbid." -- Romans 6:15
