"How do I follow Him?"
In Palestine in 30 A.D. the answer to this question had a certain direct circumstantial simplicity to it. One could go up to the Master and simply say, "I want to be your disciple." The original disciples followed Jesus by actually, physically following him around, listening to him, doing what he asked them to do, spending time with him and watching him, making him the model of their lives, receiving his healing power, his grace, his forgiveness. Then, Jesus ascended into heaven; his humanity took its definitive place at the center of all creation from which he would rule as Lord of all the universe and Lord of all history.
So now he's in heaven. But I'm still on earth. How do I follow him now? If I were living in the time immediately after the Ascension, the question would still have been relatively uncomplicated from a sociological point of view. There were these 12 men who had spent a lot of time with him, who knew him intimately — I would go stay with them, watch them, do what they told me to do. In fact, Jesus pointed these men out explicitly: he said to them, "He who hears you, hears me." They were the men that Jesus has directly "sent" to continue his work. If I spoke Greek I would refer to this "sending" by calling them "apostles." The apostles are the emissaries of Jesus; they are the direct "link" with the humanity of Jesus.
But now two thousand years separate us from Jesus and his apostles. How can I be in vital contact with Jesus now? If Jesus says, "no one comes to the Father except through me. . . no one attains to the goal and the fulfillment of his existence except through me"; if he means that I am obligated to believe in him and follow him now, in the 21st century, then he must have established some means whereby I can be in contact with him. What does it mean to belong to Christ today? When I look around, I see a lot of people who call themselves Christians, "followers of Christ" (which is what I want to be). And yet everybody says different things. There are all these different, competing claims about "the true way to follow Christ." How do I judge between them? How can I determine which way is the true way? Remember, if Jesus really made the claim to be the salvation of men in all times, then there must be some concrete possibility to follow him now. There is.....the Church; a physical Church!