Hugo once said, "If you lose innocence, you lose the treasure in your heart."

Tagore said: "Children are the hope of the future. To keep them innocent is to keep the future of the world. "

Balzac said: "Childhood is the most precious wealth in life."

Gorky thinks: "Childhood is short, but childlike innocence is eternal."

Romain rolland said: "Children's dreams are the reality of the future."

Tagore said: "Nothing in the world is more precious than childhood, because it is the only real enjoyment in life."

Balzac said: "Childhood is a period of rational sleep."

Belinsky thought: "Childhood is the spring of life."

Heidegger said: "If a person loses innocence, he loses the poetry in life."