Jude 1: 17-23
But, dear friends, remember what the apostles of our Lord Jesus Christ foretold. They said to you, "In the last times there will be scoffers who will follow their own ungodly desires." These are the men who divide you, who follow mere natural instincts and do not have the Spirit. But you, dear friends, build yourselves up in your most holy faith and pray in the Holy Spirit. Keep yourselves in God's love as you wait for the mercy of our Lord Jesus Christ to bring you to eternal life. Be merciful to those who doubt; snatch others from the fire and save them; to others show mercy, mixed with fear--hating even the clothing stained by corrupted flesh.
Many things done here on Earth are carried out from the natural instincts of man. Where do these natural instincts come from? Yes, they come from the sinful nature of the Devil in man. We have already told you how did it get there in the first place. It's all there explained in the book in detail, Christformation In You-From Genesis to Revelation-The Big Picture. Go get a copy, read it and you will know what they are. Just to help you here, if you haven't got a copy yet.....
What is the natural instinct? You may want to know what is acting out of your own natural instincts. Natural instinct is how you react to things as you see it in your given situation. Just like an animal, how does an animal react when it is hungry? It's natural instincts say; I must change this situation. Most of the time, your natural instincts forces you to see things differently, suiting your own situations. Not one situation is the same or identitical. Your natural instinct may say to you that you do not like the situation you are in right now. So, you may want to change that situation. To change that situation, you may want to look away from your situation. You turn away your eyes from that situation you are in and start looking at other things around you. You are trying to change that situation that you are in now. For example, you may want to turn your eyes away from poverty by becoming greedy. Sometimes, excessively greedy. How do you do this? By fixing your eyes on money! You take your eyes off God to do this. You can't see both at the same time. It's impossible!
So, who has been leading you all this while? The Spirit of God or your natural instincts? How can you confidently claim that you have been led by God's Spirit when you have only been led by your natural instincts? Who were you trying to fool? Haven't you been blaspheming God the Holy Spirit all the while? You know what are the consequences of doing that, but you still continue doing these things confidently. We can't just imagine what the LORD has in store for you. You can cheat men who are like you, but you cannot cheat God.
And so I tell you, every sin and blasphemy will be forgiven men, but the blasphemy against the Spirit will not be forgiven. Anyone who speaks a word against the Son of Man will be forgiven, but anyone who speaks against the Holy Spirit will not be forgiven, either in this age or in the age to come.