Being friendly is a trivial matter that we hear often when there are issues to settle. Come to think of it. When you are friendly that means you have less enemies or maybe you have no enemy at all. That would give your life peace and comfort because no one is bothering you. With that condition in life you can feel happiness and that can uplift your spirits, so to speak. A happy person is far from sickness. Even if that is not really accurate, well, I prefer to be happy at all times.