Water tastes tasteless and swings into ripples; There is no fire in the stone. What does it mean that light comes from collision? (Thank you)

Dim stones, without bright flames, can emit smart light when they collide with each other.

This sentence means that energy is released when it collides with each other, and thinking can only develop and generate inspiration through constant collision. In other words, we can't block our thinking. Only by constantly communicating with others, even if it is not consistent with us, can we constantly improve and improve our thinking and produce meaningful ideas.