One reviewer wrote that he felt the book said "To enter into Heaven, the only prerequiste was to give up a vice. That was all. Some lust, some apostasty, some selfishness and false love. " In all respect, I beg to disagree. I feel Lewis was saying that In order to get the desires of your heart, ( The mother Pam wanted to be with her son Michael for example)The first desire of your heart should be for God. "Seek ye FIRST the Kingdom of God, and HIS rightiousness, and (then) all these things will be added. God wants to give us everything, but he is unable to until we give up our nothingness.