Christianity is made up of journeys – the wanderings of Jesus are a pattern for our lives of faith. If left to ourselves, we may put off leaving the comfort of our homes or our mindset until we are ready. There is always something else we might need; just in case.
Jesus says, No, you are ready now; you have everything you need. Travelling in the comfort of like-minded people may give you security but not courage. Having provisions means you may not ask for help; so how can people offer theirs? Being self-sufficient – how will you understand the needs of others; appreciate the hospitality of strangers.
In taking nothing, you will take everything I and my Father have given you. Your journey, your mission, is to take me, my Father and the Spirit out into the world. Take nothing else.