The first idea is about the discussion of life attitude. We can look at it from two aspects, one is a positive attitude and the other is a negative attitude. Two attitudes see two different worlds, and finally come to the conclusion that people's mentality determines their views on things.

The second idea, loneliness is the depression of mentality and the fading of self-ideal, can also be understood in this way.

The third idea can be written like this, that is, the life of modern people is full of loneliness, the distance between people needs to wear the mask of network to communicate, people are lonely, and modern people have lost anything while making scientific and technological progress.