Critically assess the view that there is no single Christian approach to morality?

The Bible says that man is basically an amoral creature - "There is none good, no not one" (Roms.3.12). This is in relation to God's judgement. However in man's judgement, morality may mean many things to many people.

But because, after God's judgement, no one is moral, good or righteous, (in other words, we are all sinners), so God sent Jesus, his only Son, as a propitiation, atonement and sacrifice for our sins or lack of morals. And only in accepting his sacrifice, are we judged by God to be moral, good or righteous.

So in the Bible, which is the word of the living God to Christians, there is only one way to morality or goodness and righteousness in God's sight - through faith in Jesus Christ.