The one true faith can be identified and should relate completely to exactness in worship as Jesus Christ. That is the challenge and the essence of finding the true faith, it must look like and thrive to resemble our Lord in all respect. So, the general idea is: SHOW ME WHAT YOU GOT. I am supposed to see a resemblance to Jesus in you. The concept that "you need Jesus" means that, it is not the true faith if there is no resembles. So, when the invitation comes to join the Kingdom of the Heavens, I should examine your worship for Christlike actions. That is the only way to get in.
2 Corinthians 13:5
5 Look closely at yourselves. Test yourselves to see if you are living in the faith. Don’t you realize that Christ Jesus is in you? Of course, if you fail the test, he is not in you.