After Jesus healed a man possessed with a thousand of demons, He told him to go home and tell his people what great things God had done for him. When he did, we learn that people were amazed.
When people compare the person we were before we became a Christian with who we are now as a Christian, are they amazed.
If not, maybe we should talk more about the great things God has done for us.
Let us amaze others with the difference God has made in our lives and the mercy He has shown us.