Isnt there an old saying called contentment and happiness? Why are you not happy with your contentment now? It is ancient, it is the ancient peoples speech and thought, perhaps he is not very comprehensive. Now the times are developing, peoples thoughts will also follow the progress, everyone will be satisfied, how the world will develop and progress. If human society stagnates due to the saying of contentment and happiness, if aliens really invade the earth, what resistance do we take? Do you still enjoy yourself at that time? Therefore, contentment is not always happy.