Romans 10:15 (NIV) "And how can anyone preach unless they are sent? As it is written: "How beautiful are the feet of those who bring good news!"
Beauty is in the eyes of the beholder. The disciples had to walk everywhere and while I am sure they desired to see the lost saved there was a price to pay for walking everywhere they went. The feet of the disciples were probably not beautiful to look at. To the people that once were blind but now could see they probably thought everything about the disciples and Jesus were beautiful. If you opened my blind eyes, healed my body, set me free I would think you were the most beautiful person I had ever seen.
There is a price to pay for everything we do and everywhere we go. We make the decision as to whether or not we will pay the price. If I had to do Croatia and Venice all over again I would gladly do it. I would choose different shoes--but I would do it none the less. Sometimes we do not know what we do not know until we feel the pain of our decisions. I had no one to tell me what to prepare for. Thank God we have men and women of God and the Bible (the word of God) to help us navigate the life we live. If we had to learn everything the hard way life would be too painful to live. I am grateful for those of the faith that have lead the way.
Takeaway-if you are going to Europe plan on walking...a lot. Pack little and wear a really good pair of shoes. In your life learn all you can from the men and women of faith who have gone ahead of you.