The Document on Human Brotherhood, signed by Pope Francis and Grand Imam Ahmed el-Tayeb in Abu Dhabi on February 4, 2019, is an important text for all, especially for Christians. It is also an invitation to consider the subject through the Bible, where there are many passages that develop the idea of brotherhood. In the New Testament, Luke in particular looks in depth at the theme of brothers and sisters, children of the same Father. The theme stands out in various episodes that appear only in his Gospel.
Brothers and sisters in comparison
One way to examine the theme is to look at the texts in which Luke compares brothers and sisters in a simple but highly original way: first of all, the episode of Martha and Mary welcoming Jesus (Luke 10:38-42), then the parable of the merciful father (Luke 15:11-32), and finally that of the rich man and poor Lazarus (Luke 16:18-31).