Love is a luxury in the material world, but it is not a necessity. People can survive without love, but life is no longer passionate. Love is a spiritual luxury, but not a necessity. People without love can live well, but their lives are no longer happy. Love is a luxury in the material world, an advanced spiritual enjoyment and a pure sensory pleasure. It is an advanced life experience. Love is a noble feeling, a pure spirit, a beautiful feeling and a noble sentiment. Love itself is pure, without any substance, and it is a kind of spiritual enjoyment. But the real society is complicated, people's thoughts are complicated, and love is also complicated. Love is a noble emotion and a beautiful emotion. Love is not an emotion.