The act of Jesus washing his apostles' feet was shocking for a few interconnected reasons, rooted in the social hierarchy and customs of the time:
* Reversal of Roles: Foot washing was a task reserved for the lowest servants or slaves. It was considered degrading and beneath someone of higher status. For Jesus, their leader and teacher (who they believed to be the Messiah), to perform such a menial task completely subverted the expected social order. Leaders were supposed to be served, not serve.
* Status and Respect: In that culture, teachers and masters were held in high esteem. Foot washing was a sign of deep respect and deference. The apostles would have expected *to* wash Jesus' feet, not the other way around. For him to perform this act, it felt inappropriate and even embarrassing.
* Lack of Understanding of Jesus' Mission: The apostles, at this point, still didn't fully grasp the nature of Jesus' kingdom or his mission. They were likely still expecting a powerful, earthly king who would overthrow Roman rule. Jesus' act of humility contradicted their expectations of a triumphant Messiah.
* Peter's Objection: Peter's initial refusal ("You shall never wash my feet!") encapsulates the apostles' mindset. He was expressing his deep respect for Jesus and his discomfort with the reversal of roles.
* Symbolic Significance: Beyond the practical act, foot washing held symbolic meaning. Jesus was demonstrating humility, selfless service, and the need for spiritual cleansing. The apostles likely didn't immediately understand the deeper significance of his actions.
In essence, Jesus' act was a profound lesson in humility, service, and love. It challenged the apostles' preconceived notions about leadership and the kingdom of God. The shock stemmed from the dramatic contrast between the expected behavior of a leader and Jesus' radical act of service.