New Defender's Study Bible Notes
13:13 Master and Lord. It is interesting and significant that the disciples, in speaking to Christ, never addressed Him simply as Jesus or even as Christ. They almost always addressed Him as “Lord,” and occasionally as “Master.” In writing their narratives about His acts and words, however, they did frequently say what “Jesus” did, or said. That was His human name, and a very fitting name, but their relation to Him was not that of man-to-man, but that of servant to Lord, or disciple to Master. When we address Him in prayer, we do well to honor Him by following their example. When we do this, He would say, as He did to His first disciples: “Ye say well.” Note also I Corinthians 12:3; Philippians 2:9-10; Romans 10:9-10.