(1) The pleasure of animals is a feeling of pursuing adaptation to the environment in the process of their own vitality development. It is instinctive, neither conscious nor free, it is the attribute of its race and is stipulated by nature. Only the characteristics of the whole race, not the characteristics of individual animals.

(2) People's aesthetic feeling is not only a kind of physiological pleasure of race, but also a kind of personality, which is a kind of psychological satisfaction and spiritual enjoyment produced by different people facing different aesthetic objects. It is by no means just a natural endowment, but a special essential force born and formed through the accumulation of generation after generation in the process of social and historical practice.