There are so many evil disciples hoping to teach the people of Christ to betray the truth and follow their arguments today. Greedy, materialist doctrine is the latest to draw what is called mega-church population to listen to such worthless trash. Then there is that which hopes to lead the faithful to believe sin no longer exists and all that is said in scripture to assure damnation is now permitted to be tolerated in church. And is by God. This evil disciple doctrine went so far as to publish its own book and call it a bible after its own self. Then there are that which hopes to divide the church by assailing all Christians faith and practice. The bigot doctrine.
No, you do not have to be pure in doctrine to be saved. God told us it is a matter of his grace that saves. And all that is needed from us is faith in that we are worthy, and that his only begotten son died to deliver the truth to us. Repent and be saved. Be baptized and enter into the rite that follows the journey of Christ as the God-Man, who was killed by the enemies of truth, was buried in the tomb, and arose in the miracle of resurrection to demonstrate the truth of his Father's word. That death is not the end for those who are in God's grace as believers in Christ.
We are not perfect. God knows. I think the effort that is necessary on our part is to recognize the impure doctrines that hope to destroy Jesus' people. And his purpose. It is easy to know who those are. They are so bold that they start churches, publish books, and access any avenue to fulfill their lowly mission. Just as God knows his own people, so too does the enemy of God Satan know his own. If you watch closely you'll see them for what they are too. Don't worry about being perfect. God loves you. That's what's perfect.