What is the greatest sin?

Question

I understand that there is one sin that cannot be forgiven and that is to blaspheme the Holy Spirit.

But beyond this, what is the greatest sin that a person can commit? Either voluntarily or involuntarily?

I believe that we might be able to gain some insight into all other sin through the answer of this question.

Answer 1

The greatest sin a man can commit is DISOBEDIENCE to God. The act of disobedience makes you break the rules of God. The sole aim of Satan is to have man disobey God like he did in the garden of Eden.

1 Samuel 15:22-23

22 And Samuel said, has the LORD has great delight in burnt offerings and sacrifices, as in obeying the voice of the LORD? Behold, to obey is better than sacrifice, and to hearken than the fat of rams

23 For rebellion is as the sin of witchcraft, and stubbornness is as iniquity and idolatry. Because thou hast rejected the word of the LORD, he hath also rejected thee from being king

In the Ten Commandments, God said you should not do this and you should not do that. There are other places in the Bible where God said we should not do other things apart from the ones mentioned in the Exodus 20. The life of Israelites/Christian is based on following God's detail instructions. In the passage mentioned above, Saul was the victim.

In this new age, our daily living and place in christ is centered around hearing from him and following his lead

Ephesians 2:1-2
1 As for you, you were dead in your transgressions and sins,
2 in which you used to live when you followed the ways of this world and of the ruler of the kingdom of the air, the spirit who is now at work in those who are disobedient

This is God's commandment to everybody

Mark 9:7 And there was a cloud that overshadowed them: and a voice came out of the cloud, saying, This is my beloved Son: hear him

Jesus also said in John 10:27

My sheep hear my voice, and I know them, and they follow me

To follow somebody's lead you have to obey them

Romans 8:14 For as many as are led by the Spirit of God, they are the sons of God

Simply disobeying God makes it the greatest sin of all time. It was the first sin, committed by the first man. It was what took them out of the garden. It was what took Satan out of heaven.

Answer 2

The greatest commandment is given to us by Jesus.

Matthew 22:36-40 NIV
36 “Teacher, which is the greatest commandment in the Law?”

37 Jesus replied: “‘Love the Lord your God with all your heart and with all your soul and with all your mind.’[a] 38 This is the first and greatest commandment. 39 And the second is like it: ‘Love your neighbor as yourself.’[b] 40 All the Law and the Prophets hang on these two commandments.”

I believe it'd follow that the greatest sin would be breaking this commandment. So I would say acting in an unloving manner would be the greatest sin. Being unloving towards God would be the greatest, followed by being unloving towards your neighbor.

Also, since the commandment is the action of loving, having a lack of love could also be considered a sin.

Putting sin in that light is convicting.