Do you ever wake up in the morning and not feel like a Christian? Wait, let me re-phrase that. Do you ever wake up and, even after your first cup of coffee, not feel like a real believer? What do we do with that?
And how about those people who attended church and sang the songs and said the prayers and served the community but whose life choices now seem totally out of sync with biblical ethics? What do we do with that? How do we come to grips with our fickle feelings and feckless friends when it comes to spiritual things? How do we know if we or anyone else is truly in the faith?
It is not a new question.
The Apostle John answered similar questions in his first letter to the churches. He gives us seven tests of faith that help us distinguish between true and false believers. They also comfort and confirm us on those days we doubt our salvation when our emotions are wiggly, and our faith is weak.
The overarching test, the one that provides the foundation and frame for the whole letter, is the Christological, or the “Christ” test. We see it in 1:3; 2:22; 4:2-3 and 5:7-12, among others. It maintains that Jesus Christ is God’s Son in the flesh who lived a real earthly life, died for our sins and rose from the dead, ascended into heaven to sit at God’s right hand, and will return to rule one day. If we do not believe that, we are not “in him.”
This belief is no mere intellectual assent or culturally acceptable confession. Ask just about anyone on the street if he believes in Jesus and, he will say yes. (OK, ask it in the South. I can’t vouch for other parts of the country). Belief, in the New Testament, means the complete acceptance of and compliance with Jesus’s claim to be Messiah, the Son of God, the only atonement for our sins and, the only hope of eternal life. It means he has our ultimate loyalties.
But as Jesus taught in the parable of the wheat and the tares, and as we see in the lives of Judas and other people in Scripture, it is possible to fake it. That’s why John provided six other tests.
- The light test, 1Jn.1:5-7. True faith lives in truth or with biblical ethics. Lives characterized by wickedness and error are in the darkness. Lives of holiness and truth are in the light.
- The humility test, 1Jn 1:8-10. True faith practices humility about personal sin. If we recognize and confess our sinfulness, he cleanses and purifies us. If not, “we make him out to be a liar.”
- The obedience test, 1Jn. 2:3-6. True faith obeys. If our lives are characterized by obedience to his commands, we “know we are in him.” If we say we are his, but our lives are characterized by disobedience to his way, we are lying to ourselves and everybody else.
- The love test, 1Jn. 2:9-11. True faith lives in love. Lives characterized by love for others, including those outside the faith, are in the light. If not, we remain in darkness.
- The worldliness test, 1Jn. 2:15-17. True faith loves the things of God. Covetousness, lust, and boastful pride belong to the world.
- And finally, the persistence test, 1 John 2:19-25. If we depart from the faith as it was handed down by the Apostles, we do not have the Father or the Son. But if we persist in that faith, we remain in him (v.24).
18 Dear children, let us not love with words or speech but with actions and in truth. 19 This is how we know that we belong to the truth and how we set our hearts at rest in his presence: 20 If our hearts condemn us, we know that God is greater than our hearts, and he knows everything.
Feelings will lie to us, and friends will sometimes forsake the way. But God’s word is true, and you can count on it.
 The New International Version. (2011). (1 Jn 3:18–20). Grand Rapids, MI: Zondervan.