What was the decision Adam and Eve made when the devil tempted them in the garden? If we read the narrative carefully, we can see that it was to eat from the tree of knowledge of good and evil so that they could become like God themselves, have knowledge within themselves and become able to live their own lives. It was not a simple disobedience to God.
What was the original plan God had for Adam and Eve when He gave them that test? That they should trust Him and His words, and do whatever He told them, even when other things attracted them and seemed to offer them advantages they had not thought of before.
So, what was the plan God made for our salvation? All of us have lived that life of independence, doing what we liked irrespective of what God thought about it, making our own plans according to whatever we wanted. Our salvation must be to bring us back to the original plan that God had for mankind, that we should trust Him and do whatever He tells us. Then, on His part, He would take complete care of us and provide us with all that we needed.
What would happen if He just forgave our sins and let us continue to do whatever we liked? What kind of a salvation would that be? But that is the kind of salvation many people have in mind when they come to Jesus. They believe that the grace of God is so great that He will not only forgive them all their past sins, but He will also keep on forgiving them afterwards every time they did what they wanted! On the top of that, He will give them everything they ask for, so that whatever they do, He will take away the consequences, and replace those consequences with blessings of every kind!
Imagine what heaven would be like, if people continued to do whatever they liked and God kept on forgiving them!
Preachers preach this and people listen to it, and they don't see any incongruity in the whole idea! They make themselves believe that all this is an amazing display of God's grace–undeserved favour–towards us. But actually it is an utter distortion of His grace. God might as well have decided to just overlook everything that we have done and still do, instead of having to sacrifice His own Son in order to become able to meet the demands of His justice and righteousness and still forgive us. Even common courtesy on our part would have required that we should respond to this love by giving up our own lives and starting to live for Him (2Co.5:14,15). God took the entire cost on Himself to be able to provide us free forgiveness. It was certainly not with the plan of letting us continue in our old ways. His grace is meant to make us new people, who will deny ourselves what we feel like doing, in order to do what God wants us to do (Ti.2:11,12).
God wants to make us a new people, with a new heart and a new spirit, who submit to Him, depend on Him, learn from Him and do all that He tells us to do. That is the transformation that salvation brings us. Don't go for a false gospel.