In vv.13-16, the second part of today’s gospel, Mark completes Jesus’ teaching on children and in the last two week’s gospel readings, Jesus has spoken very stern words to the disciples about their arrogance, and spiritual pride, and what welcoming someone truly means.
Yet here in v.13 of today’s passage, which immediately follows last week’s, they are doing exactly what Jesus told them not to; creating a stumbling block for little children being brought to God.
What part of millstone, neck, and being thrown into the sea didn’t they understand!