The first of the last words is this- You must be born again- But in view of all of the fake views on salvation, you must understand salvation in an accurate way. Nicodemus had a wrong idea of salvation and was gently and effectively counselling by Jesus. Salvation is not moral reform. It is a matter of being born again. Such a dramatic change in a person becomes consistently obvious in their behaviour and attitudes. Being born again is also no something you can do to yourself. You need god to perform this life-giving miracle for you. The best thing to do, if you realise you are not born again, is to ask him for this new life.