I think the sacrifice is good. The sacrifice is the basic qualification of people who want to live together in society. Everyone in society must have shared sacrifice for each other. Unselfish Sacrifice is what they should do. Whether large or small, if we know the sacrifice and share. We will know the value of mutual aid. We probably will not get anything from sacrificing much. But if you take a look at what you have sacrificed to it then you will know that it is a sacrifice, just a little, but the results are good, it happens quite a lot. Ourselves, it might be selfish in the depths of the mind of everyone, but you need to know the sacrifice, selfishness, it is certainly not in the mind.