Contradiction with 2 Peter 3:9
This verse suggests that God is not willing for any to perish, which could be seen as contradicting the notion of selective security implied in John 10:29.
2 Peter 3:9: The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.
Contradiction with Matthew 7:21-23
These verses indicate that not everyone who believes they belong to Jesus will be saved, contrasting with the assurance of security in John 10:29.
Matthew 7:21-23: 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 Hebrews 6:4-6
This passage warns about those who have once shared in the Holy Spirit falling away, contradicting the promise of being unable to be plucked from the Father’s hand in John 10:29.
Hebrews 6:4-6: For [it is] impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost,
Paradox #1
Some people might see a conflict between the idea in this verse and the concept of free will. If believers are always secure and can't be "taken away," it may raise questions about whether people still have the freedom to choose or reject their faith. This could seem inconsistent with the broader biblical theme of humans having the choice to follow or not follow God.