II Cor. 5:17 What this means is that those who become Christians become new persons. They are not the same anymore, for the old life is gone. A new life has begun!
No two believers come to Christ exactly the same way. We all travel down a different path of life and experience life in different ways. The Lord meets each of us on our unique paths and draws us to himself. What may work for me would not necessarily be what you need in order to believe and surrender your heart to Christ. He alone knows how to best touch our souls.
No two believers grow in Christ exactly the same way. Some of us seem to grow up overnight, while some of us take years to grow up. Some of us take root right away and begin to show signs of dramatic change, while for others change happens at a snail's pace.
Regardless of how we are changed or how quickly it may happen, the fact of the matter is, we who are in Christ will all change. Jesus changes me. I cannot be who I was before Jesus entered my life. Everything I was is open to change. I am not who I was, I am a new person in Christ. I an under new ownership. I follow new rules for living. I have a new example to follow. If I don't let Jesus have any part of me then I am denying Him as my Lord. It may take a while for the Lord to change me, but change me He will if He is indeed my Savior and Lord.
Jesus is both Savior and Lord. We cannot have one without the other if we are going to live lives that are pleasing to God. In other words, God is never pleased with those who claim Jesus as their Savior but refuse to let Him be their Lord. Jesus is both and it is impossible to live in fellowship with Him without both being true in our hearts. If He is not your Lord, you are not moving in the right direction in your life.