"We though many are one body in Christ, and individually parts of one another," St. Paul writes*. That "one body in Christ," or what is known in Catholicism as the "Mystical Body of Christ," is simply the community of those who believe in Christ and are united to Him by baptism -- it is the one, holy, catholic and apostolic Church.
Often times when people think of the "Catholic Church," they picture the hierarchy, the Vatican, the pope, the cardinals, bishops, priests etc. And the Church certainly includes all these.
But the Church is all of us, all who are baptized in Christ.
We may think that a life of "holiness" is the business of those ordained types, and the nuns and monks. When it comes to living and praying and being like Jesus, that's for those folks, not me. I have a real job!
But Christ calls us to love one another as He loves us. It is called the "universal call to holiness." He calls all of us who are baptized in Him to really give of ourselves to each other and devote ourselves to one another's wellbeing, the way He first did for us.
The image of "one body" is useful here. St. Paul writes that the "eye cannot say to the hand, 'I do not need your hep,' nor the head to the feet, 'I have no need of you.' No much rather those that seem the more feeble members of the body are in fact that much more necessary, and those that seem less honorable, we surround with even more abundant honor.'"**
I, Mark, am one body. Suppose my hand is bleeding from a gash, almost severed, dangling there by a couple of hairs, and blood is spewing all over my shirt and pants. Suppose I look at my hand, shrug indifferently, and say, "Eh, whatever."
I suspect you would think there was something rather wrong with me. Men in white coats would have to come take me away.
Why? Because what is supposed to happen is the whole rest of my body is supposed to get to work to try to fix that.
And notice, if I react to my wound with indifference, then the problem is not just with my hand, but with all of me. With my whole body and my whole mind. You'd think I was crazy, or suicidal, or not all there, or something.
Well if we're One Body in Christ, what does that mean? It means that if just one of us is hurting spiritually, emotionally, or in any other way, and the rest of us do nothing to help that person, then something is wrong with our whole body, our whole mind, our whole soul.
If we are truly one body in Christ, then indifference is not an option.
This is not some Communist-type collectivism that destroys individuality or personal responsibility. Jesus did not create a political city-state. He started a family. And the genius of a family is that you as an individual are loved unconditionally simply because you are a part of the family, and yet you grow up recognizing that you are not the only person on the planet. Sometimes you have to wait in line for the bathroom. Sometimes you have to clean up messes you didn't make. But other times you learn just how great it is to have your mom and dad tell you "good job."
You learn in your family better than anywhere else exactly who you are, what you're good at, what you enjoy, what you uniquely have to offer to the family and to the world. And the goal of a member of the family of God, the Body of Christ, is to hear the Father say to us, the same way He said it to Jesus, "With you I am well pleased."***
And the really interesting thing about families, and this is something we could sure be reminded of these days: the bigger the better. Maybe that's why Jesus told His disciples to go and make disciples of "all nations."+
*Romans 12:5
**I Corinthians 12:21-23
***Matthew 3:17
+Matthew 28:19