I really liked the talk. It is true and it is good to remember that contrary to what seems as truth to us can be the opposite for someone else. This made me think of the different gestures we use in our countries. Like in Turkey when you want to say "yes" you move your head up and down and for "no" you move from left to right (or right to left). In some cultures however, moving the head from left to right can mean "yes". Imagine how difficult it may be for that person to express himself if he did not know this