Contradiction with Matthew 24:36
It contradicts Mark 13:27 by emphasizing that no one knows the hour of the gathering, while Mark 13:27 describes a foretold gathering event.
Matthew 24:36: But of that day and hour knoweth no [man], no, not the angels of heaven, but my Father only.
Contradiction with 1 Thessalonians 5:2
Contradicts by highlighting the unpredictability of the Lord's coming, unlike the described gathering of elect in Mark 13:27.
1 Thessalonians 5:2: For yourselves know perfectly that the day of the Lord so cometh as a thief in the night.
Contradiction with 2 Peter 3:10
Highlights a sudden coming "as a thief," contrasting the specific actions of gathering described in Mark 13:27.
2 Peter 3:10: But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up.
Paradox #1
Some people see a conflict between Mark 13:27 and the idea that people have free will to choose their own path. The verse suggests a specific action by God that might imply a lack of choice in the matter. This can raise questions about how much control individuals have over their own salvation if God is the one making a decision about who gets chosen.