Whoever knows that the mind is a fiction and devoid of anything real knows that his own mind neither exists nor doesn't exist.
If you use your mind to look for a Buddha, you won't see the Buddha.
Reality has no inside, outside, or middle part.
At every moment where language can't go, that's your mind.
Unless you see your nature, all this talk about cause & effect is nonsense. Buddhas don't practice nonsense.
The Way is basically perfect. It doesn't require perfecting. The Way has no form or sound. It's subtle and hard to perceive. It's like when you drink water: you know how hot or cold it is, but you can't tell others.