New spiritual lessons I was taught during my last trip

I just came back from another trip. This time I traveled to Saint Petersburg, Moscow and Bodrum. Not surprisingly, I had some difficulties and misunderstandings; however, when I came back home I suddenly understood that I am not the person that left my hometown three weeks ago.
All these lessons were spiritual, because lately the only thing that bothers me is hapiness: what is it and how do I find satisfaction not only for the moment but globally as well. I am sure those principles can work for other people too, or at least it is something to just think about...