Confucius, a pioneer in the field of {#blank#}1{#/blank#} (教育). He was born in the year 551 B. C. He was a great thinker who had many wise ideas about human nature and behavior. His main ideas are about kindness and good manners. He was also a famous philosopher whose wise sayings have i{#blank#}2{#/blank#} many people in d{#blank#}3{#/blank#} countries. For example, one of his famous sayings, "He who learns but does not think is lost; he who thinks but does not learn is in d{#blank#}4{#/blank#}", tells us the {#blank#}5{#/blank#} (重要性) of learning and thinking.