Contradiction with Matthew 7:21
Contradicts John 21:16 by emphasizing that not everyone who acknowledges Jesus as Lord will enter the kingdom of heaven, while John 21:16 emphasizes love and care for Jesus' flock as a demonstration of love for Him.
Matthew 7:21: Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven.
Contradiction with 1 John 4:20
Contradicts John 21:16 by pointing out that a claim to love God is false if one hates a brother, whereas John 21:16 focuses on expressing love for Jesus through shepherding His followers.
1 John 4:20: If a man say, I love God, and hateth his brother, he is a liar: for he that loveth not his brother whom he hath seen, how can he love God whom he hath not seen?
Contradiction with James 2:14
Contradicts John 21:16 by emphasizing faith without works is dead, whereas John 21:16 emphasizes the importance of action (feeding the sheep) as an expression of love for Jesus.
James 2:14: What [doth it] profit, my brethren, though a man say he hath faith, and have not works? can faith save him?
Contradiction with 1 Corinthians 13:1
Contradicts John 21:16 by highlighting that even speaking in tongues without love is meaningless, while John 21:16 stresses love demonstrated through pastoral care.
1 Corinthians 13:1: Though I speak with the tongues of men and of angels, and have not charity, I am become [as] sounding brass, or a tinkling cymbal.
Contradiction with Matthew 19:21
Contradicts John 21:16 by emphasizing self-sacrifice and giving to the poor as the way to be perfect, while John 21:16 focuses on feeding and tending to Jesus' sheep as the manifestation of love for Him.
Matthew 19:21: Jesus said unto him, If thou wilt be perfect, go [and] sell that thou hast, and give to the poor, and thou shalt have treasure in heaven: and come [and] follow me.