“For this you know, that no fornicator, unclean person, nor covetous man, who is an idolater, has any inheritance in the kingdom of Christ and God”
(Eph. 5:5 NKJV)

we can know right from wrong

From this passage we learn that . . .

1. We can ‘know’ right and wrong. The Bible tells us so. “Then Jesus said to those Jews who believed Him, “If you abide in My word, you are My disciples indeed. And you shall know the truth, and the truth shall make you free” – John 8:31-32. “Test all things; hold fast what is good. Abstain from every form of evil” – 1 Thessalonians 5:21-22.
2. Though immoral people may prosper in this life, they exclude themselves from God’s incorruptible, undefiled, and unfading inheritance that He has reserved for us in heaven, 1 Pt.1:4.
3. “No fornicator . . . has any inheritance in the kingdom of Christ and God.” This statement strongly proves the possibility of apostasy. Paul’s warning is directed toward Christians. Immoral people who refuse to repent and to obey the Lord have no hope of heaven (Revelation 21:8).
4. It is not unkind to warn people that, unless they repent, they will not go to heaven. In fact, kindness demands loving warnings.

– Rick Duggin