All Roads Do Not Lead to Rome

I recently started reading One Lord...One Faith by Mark E. Peterson. This will probably be the first of many gems that I find in this book.

He starts the book by saying "One of the great fallacies of the world today is found in the expression: 'All roads lead to Rome.' They do not."

He then quoted the Savior from Matthew 7:21. "Not everyone that saith unto me, Lord, Lord, shall enter into the Kingdom of Heaven, but he that doeth the will of my Father which is in Heaven"