Summary: How to know that you are truly saved.
2 Corinthians 13:5 Examine yourselves, whether ye be in the faith; prove your own selves. Know ye not your own selves, how that Jesus Christ is in you, except ye be reprobates?
2 Corinthians 13:6 But I trust that ye shall know that we are not reprobates.
I think it’s very important and needful to define the term “Nominal Christianity.” Here are two definitions gleaned from a web search:
Mainstream/Secular definition: A nominal Christian is one who says he/she is a Christian but hardly ever goes to church. Or, someone who selects "Christianity" as their religion for any official purpose (e.g. national census), but consider him/herself to be a non-practicing Christian.
Christian definition: A nominal Christian is one who says he/she is a Christian, but does not possess a trusting, faithful, dependent relationship with the Lord Jesus Christ; a relationship made possible by Christ's propitiation on the cross and the gift of the Holy Spirit to those predestined by God the Father. The church attendance of a nominal Christian is not relevant to whether they are nominal or not; a nominal Christian can attend church weekly or rarely. A nominal Christian may undertake religious activities (especially at Christmas/Easter), and proclaim fellowship with followers of Jesus (for example, through being a "member" of a church), but in their heart they will possess apathy or even unbelief toward the sovereignty of Jesus Christ.
I. The Truth about Nominal Christianity
a. An observation – First, let me say that where this subject is concerned, I do not pretend to have all the answers. I am in the same boat as you are, so to speak. I do not have a personal axe to grind or a pet theology, my only desire is to help those who may be struggling or who may be sincerely wrong about this issue of what it means to be a Christian. There are so many organizations and institutions that have rigid requirements for membership and you have to provide concrete evidence to support your claim as a member. In the book, “Am I Really a Christian?” author Mike McKinley makes the following statement: “A lot of subcultures and cliques are notoriously picky about who really “belongs.” For instance I am a member of the AARP and there is an age limitation and a financial obligation involved in being a member. If I didn’t meet those criteria then I could not be a member. Yet, whether or not I belong to AARP is not of eternal consequence. Let me give you another example: Spend a little time with my friend Scott and you will find out that he is a huge Alabama football fan. He follows the team closely, wears the memorabilia, has the team logo plastered on his vehicle, his home, and his business, is a season ticket holder and goes to the games, and depending on whether they lose or win, he may be in a bad mood (thankfully for Scott, they win most of the time). I have another friend who also claims to be an Alabama football fan but he does almost none of the above. I would not consider him to be a “real” Alabama football fan. That being said, whether or not you are an Alabama fanatic or just a fan is pretty meaningless in the grand scheme of life. In the final accounting it will matter. However if we turn the topic to whether or not you are a Christian we leave the trivial pursuits of life and get into some very deep water!