The Immoral Won't Become Immortal
The English word "moral" originated from a Latin word which means manners, as in behavior. The prefix im is from the Latin meaning not i.e. immoral means not behaving in a good way (although immorality is today used to refer to bad sexual behavior, the literal meaning meant bad manners in general, which includes bad sexual behavior).
The English word "mortal" originated from the Latin word for death, mortis. It now is used to refer to the state of being subject to eventual death; hence immortal means not being subject to death.
The Word of God is very clear that the immoral will not become immortal:
"6:9 Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived: neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind, 6:10 Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God." (1 Corinthians 6:9-10 KJV)
The Origin Of The Moral Law
While God's Law of morality existed right from the time of Creation (see The Ten Commandments Before Sinai?), the Israelites were first given the Law in written form at Mount Sinai. Leviticus chapter 18 summarizes what is moral and what is not, in the eyes of God - the God who decides who will be granted salvation, based upon how they have chosen to behave.
"18:1 And the LORD [see 'Before Abraham Was, I AM'] spake unto Moses, saying, 18:2 Speak unto the children of Israel, and say unto them, I am the LORD your God. 18:3 After the doings of the land of Egypt, wherein ye dwelt, shall ye not do: and after the doings of the land of Canaan, whither I bring you, shall ye not do: neither shall ye walk in their ordinances. 18:4 Ye shall do my judgments, and keep mine ordinances, to walk therein: I am the LORD your God. 18:5 Ye shall therefore keep my statutes, and my judgments: which if a man do, he shall live in them: I am the LORD.
Fact Finder: What does "concupiscence" mean?