As soon as the half-acre square pond is opened,
The sky is full of clouds and shadows.
Why is the water in the pond so clear?
Because there is inexhaustible living water for it.
Philosophy takes the pond as a metaphor, explaining that the method of learning is to accumulate and absorb new nutrients. Everything is moving, changing and developing, and everything can maintain its existence only in movement. It is this uninterrupted movement, change and development that makes things exist in constant self-renewal. Once this movement stops, things can't exist. If there is no constant renewal and accumulation of knowledge, one's knowledge will become a stagnant pool, lifeless and without progress. Learning is like this, and so is doing other things.
Title Xilinbi (Song Sushi)
Seen from the side of the ridge, it becomes a mountain peak.
The distance is different.
I don't know the true face of Lushan Mountain,
Just because I'm in this mountain.
Philosophers observe things from different positions and angles and come to different conclusions. Only when people get rid of subjective and objective limitations, stay out of Lushan Mountain and have foresight can they really see the true face of Lushan Mountain. To understand the essence of things, we must observe them from all angles, both objectively and comprehensively.