人的精神活动的本质是什么？这是发展马克思主义哲学不能回避的一个问题。国内已经有学者从精神活动应被认作是实践活动的必要性方面提出了“精神活动也是一种实践活动”的观点。本文想从精神活动本身证明精神活动的本质是内部实践，并以此为根基，重新探讨实践发展的内部... What is the nature of human mental activity? This is an issue that can not be avoided in developing Marxist philosophy. Some scholars in China have put forward the view that “mental activity is also a kind of practical activity” from the necessity of thinking that mental activity should be regarded as practical activity. This article wants to prove from the mental activity itself that the essence of mental activity is internal practice and as a basis for re-exploring the internal development of practice ...