Speaking about the deep contradictions in human nature, Japanese actor Hiroyuki Sanada said: “Some people dream of having a swimming pool at home, while those who have one barely use it. Those who have lost a loved one feel a profound sense of loss, while others often complain about the relatives still in their lives. Those without a partner long for one, while those who have a partner often fail to appreciate them. The hungry would give anything for a meal, while the full complain about the taste of their food. Those without a car dream of owning one, while those who have a car are always looking for a better one. The key to happiness is gratitude—to truly see and value what we already have, and to understand that somewhere, someone would give everything for what we take for granted.”