Random talk on education. It was first put forward by John Locke, a British philosopher in the17th century, in "Random Talk on Education". It is believed that children's hearts are "a blank sheet of paper or a piece of wax" and that "the reason why human beings are so different is because of education". Therefore, human beings are so different because of education. British philosopher Locke believes that the human mind is like a whiteboard, and thoughts and cognition come from the day after tomorrow. The reason why human beings are so different is education, which is Locke's "whiteboard theory". Swiss educator Pestalozzi advocates that education should conform to nature and let children develop naturally. He was the first person to put forward the idea of "psychological education".