As a basketball fan, I know a lot about Michael Jordan. I could answer a lot of statistical questions you might or might not have about him. But if I tried to get in to see him, his security guards would ask not if I know him, but does he know me. The answer to that question is "no," by the way.
"Not everyone who says to me, `Lord, Lord,' will enter the kingdom of heaven, but only he who does the will of my Father who is in heaven. Many will say to me on that day, `Lord, Lord, did we not prophesy in your name, and in your name drive out demons and perform many miracles?' Then I will tell them plainly, `I never knew you. Away from me, you evildoers!' - Matt. 7:21-23
If Jesus will say, "I never knew you," to some people, how can I be sure that He will know me when my time comes? The easy answer, Love Him.
But the man who loves God is known by God. - 1 Cor. 8:3
God knows those who love Him. We like to say in our church that we are not trying to teach you how to join a religion; we are trying to lead you into a relationship with Jesus Christ. That relationship that He desires is one of mutual love. God showed His love for us in that while we were yet sinners, Christ died for us. His act of love has already been carried out for every generation, so how do we show Him our love? How do we make this a two-way relationship?
Jesus replied, "If anyone loves me, he will obey my teaching. My Father will love him, and we will come to him and make our home with him. He who does not love me will not obey my teaching. These words you hear are not my own; they belong to the Father who sent me. - John 14:23-24
Jesus only gave us one teaching that specifically said, "This is how you show me that you love me," and it wasn't by singing certain songs or filling out certain formulas. You can't go down a check-list and make sure you have fulfilled your quota of good works.
To show our love to Jesus, we must live a life of obedience. If we love Jesus, we obey Him, and the love of the Father is on us. If we do not obey Jesus, we do not love Him. If we do not love Him, we are not known by Him. If we are not know by Him, we will not get in to the eternal kingdom which He has prepared for us.
A relationship is always a two-way street. God has already shown His love for us - He gave us Jesus. Will you choose to love Him back, and obey His word?