This year of travel has offered me some profound learning experiences, none more than this simple lesson: impermanence teaches you what you want to be permanent. When everything is temporary, it gets obvious what you want to keep around. Traveling full-time often means energy reserves are low and sleep is minimal, so I’ve become acutely aware of who and what requires energy, and who and what refills my reserves. Motivation is a scarce resource, and only certain activities that you’re truly passionate about can keep you going. These activities form a kind of “energy symbiosis;” they may drain you, but…