Once we’ve tasted the salt in our own house, we know what all the salt in the world tastes like; we don’t have to go around tasting the salt in everybody else’s houses to know it is salty. In the same way, once we know that the phenomena in our own being are all impermanent, stressful and non-self, then we know by inference that all the phenomena external to ourselves are impermanent, stressful and non-self just the same. — Ajaan Tong Sirimangalo