“Sanctify Christ as Lord in your hearts (1 Pet 3:15).” What an interesting exhortation from our second reading this weekend. First, it is amazing to think that we can sanctify Christ. Usually we see it the other way around—Christ sanctifies us. He does, yes, but we also make Jesus holy. One of the ways we make Jesus holy is when we make him the Lord of our hearts.
This is the second point. It's not by mighty works of charity or piety that we bless God, but by what we "" in our hearts. What we are called to "do" is to make Jesus the complete master of our hearts. This isn't as easy as it seems. I would argue, in fact, that it's easier to say a rosary, go to a soup kitchen, or attend Mass than to say with all sincerity that Christ, and nothing else, rules our hearts. Think of all the other things that occupy a space in our hearts: family, career, hobbies, and pleasures. Does Christ come first and is he above all these other things? That is, are all of these things regulated and determined by God? Christ might be in our hearts, but he is the Lord? Yes, that is difficult.