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知识来源于实践。这是众所周知的。但对个人来讲,知识又是怎么获得的呢?一方面在生产实践、社会实践和科学实验等活动中,通过感知获得大量的感性知识,再经过思考上升为理性认识,从而成为个人知识的一小部分来源;另一方面是直接把人类在长期实践中积累起来的知识继承过来,这是个人知识的大部分来源。正如恩格斯所说:“每一个体都必须亲自去经验,这不再是必要的了;它的个体的经验,在某种程度上可以由它的历代祖先的经验的结果代替。”
Knowledge comes from practice. It is well known. But for the individual, how did the knowledge get? On the one hand, in the practice of production, social practice and scientific experiments and other activities, through the perception of access to a large number of perceptual knowledge, and then rose to rational understanding, and thus become personal knowledge A small part of the source; on the other hand, directly inherit the knowledge accumulated by human beings in long-term practice, which is the bulk of the source of personal knowledge. As Engels said: “It is no longer necessary for every individual to experience for himself, and its individual experience may in part be replaced by the result of the experience of its ancestors.”