I commented to her that there were only 3 things that you really needed to travel. If you had those three things, then you really didn’t need anything else. Moreover, all three of those things could fit in your pocket.
A few days ago I was having a conversation with someone about packing light and I repeated those same three things. In 10 years, my opinion of the absolute minimum necessary to travel hasn’t really changed.
When you strip everything down to the barest of essentials, there are only 3 things you need to go anywhere in the world (other than the clothes on your back). Those three things will fit in your pocket and take you anywhere. They are: