Sengcan said this quote

When no discriminating thoughts arise,the old mind ceases to exist.When thought objects vanish,the thinking-subject vanishes,as when the mind vanishes, objects vanish.Things are objects because of the subject;the mind is such because of things.Understand the relativity of these two and the basic reality: the unity of emptiness.In this Emptiness the two are indistinguishable and each contains in itself the whole world.If you do not discriminate between coarse and fine you will not be tempted to prejudice and opinion.