"Heaven is nature, and man is himself" means that heaven and earth are constantly moving and developing according to the objective laws of nature, regardless of human will; And people's life path mainly depends on their own way.

1. Everything in the world is moving, and the movement is regular and the law is objective. Its existence and function are independent of human will and irresistible.

2. People have subjective initiative, and they can understand and use the law to make profits for themselves. If people want to do something in the activities of understanding and transforming the world, they must give full play to their subjective initiative.