Sadly, many think their salvation is secure because they warm a pew on Sunday morning or because they follow certain ministers.
I do not belong to any particular denomination. My church is nondenominational. I refuse to be bound by an individual's or a denomination's doctrine. Having said that, I do not consider all Roman Catholics, Baptists, Methodists, Prebyterian's, Episcopalians, etc to lost souls or heretics. I believe there are many in these divisions that do love the Lord with their hearts and souls.
This is because the Holy Spirit can break through the walls built up by church doctrine or the individual's spirit. I have a good friend who is Catholic, for whom I prayed for many years. She was touched by the Lord in her Catholic church and has asked him to be her Savior. She is a born again Catholic, still attending Catholic church, but also attending women's devotional study during the week. She has grown tremendously in God's Word and is living proof that God enters all churches, seeking out His own.