Why did Peter cut off the ear of Malchus, one of the people trying to arrest Jesus?

Why did Peter cut off the ear of Malchus, one of the people trying to arrest Jesus? Why did Jesus then heal Malchus’s ear?

File:The arrest of Christ - the kiss of Judas; the ear of Malchus cut off by St. Peter - Book of hours Simon de Varie - KB 74 G37a - 020r min.jpg - Wikimedia Commons

What was the significance of Jesus healing the soldier's ear that

Jesus Heals Malchus, The High Priest's Servant, During His Arrest

The arrest of Christ: the kiss of Judas; the ear of Malchus cut

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Jesus Heals Malchus, The High Priest's Servant, During His Arrest – The Additional Needs Blogfather

Judas kiss and arrest of Christ Passion of Christ (series title), Judas kisses Christ on the cheek. The soldiers surround and arrest him. Peter is about to cut off the ear of