You must love the Lord your God, and your neighbour as yourself
When you look at something like the Catechism of the Catholic Church, and see its 691 pages, or look at the 2,000 pages of the big Jerusalem Bible, you can be forgiven for thinking that Christianity is a complicated affair. But Jesus reminds us today that it is essentially very simple: everything can be summed up in two basic rules: love God, love your neighbour. Exodus backs this up, by talking about the simple love that we must show to each other. Not that this is easy – love is always costly, and involves some degree of sacrifice. We will have to change, to become perfect in love; but it is possible, and when we do, like the people of Thessalonica, we become a great example to people everywhere.