Contradiction with John 13:13
Jesus acknowledges the title of 'Master' and 'Lord,' which contrasts with the directive in Matthew 23:10 not to be called 'Master.'
John 13:13: Ye call me Master and Lord: and ye say well; for [so] I am.
Contradiction with 1 Corinthians 4:15
Paul describes himself as a 'father' in faith, in contrast to Matthew 23:10, which discourages the use of hierarchical titles.
1 Corinthians 4:15: For though ye have ten thousand instructors in Christ, yet [have ye] not many fathers: for in Christ Jesus I have begotten you through the gospel.
Contradiction with Hebrews 13:17
This verse instructs obedience to leaders, which could be seen as contradictory to the message of equality in Matthew 23:10.
Hebrews 13:17: Obey them that have the rule over you, and submit yourselves: for they watch for your souls, as they that must give account, that they may do it with joy, and not with grief: for that [is] unprofitable for you. [have...: or, guide]
Contradiction with Philippians 3:17
Paul urges others to follow his example, an implicit leadership position contrary to the caution against titles in Matthew 23:10.
Philippians 3:17: Brethren, be followers together of me, and mark them which walk so as ye have us for an ensample.
Contradiction with Ephesians 4:11
This verse outlines roles like apostles and teachers, which appear to contradict the direction not to assume specific titles given in Matthew 23:10.
Ephesians 4:11: And he gave some, apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;
Paradox #1
Matthew 23:10 could be seen as a contradiction to the hierarchical structure in some Christian denominations that use titles such as "teacher" or "leader" for their clergy. The verse suggests that such titles should be reserved for Christ alone. This can create tension between the practice of using these titles in churches and the guidance given in this verse.
Paradox #2
Matthew 23:10 discusses not calling anyone your teacher because you have one teacher, the Christ. A contradiction might arise because elsewhere in the Bible, teaching and teachers are often respected and valued, creating a tension between respecting earthly teachers and reserving ultimate recognition for Christ.