In Brief CCC 455
© Libreria Editrice Vaticana Source: vatican.va
The title "Lord" indicates divine sovereignty. To confess or invoke Jesus as Lord is to believe in his divinity. "No one can say 'Jesus is Lord' except by the Holy Spirit'" (I Cor 12:3).
Read the full chapter 2. I Believe in Jesus Christ, the Only Son of God ¶422–682