Goodbye and Hello are quite routine words in our everyday life.
Every morning, its Goodbye home and Hello work.
Then its Goodbye work and Hello lunch.
Then its Goodbye lunch and Hello work again. Then its Goodbye work and Hello ...
Our life is so dynamic.
Meet people. Greet people. Make new friends. Choose few. Keep the best. Select some. Select one!
Goodbye and Hello are by far our most widely used human interactions.