When thoughts arise, then do all things arise. When thoughts vanish, then do all things vanish. - Huangbo Xiyun

Sending the Buddha in search of the Buddha, grasping the mind with the mind, they may exhaust themselves in striving for an entire eon but will never get it. They do not understand that if they cease their thoughts and end their thinking, the Buddha will automatically be present.

The foolish reject what they see and not what they think; the wise reject what they think and not what they see.

If one definitively understands that all dharmas are fundamentally nonexistent and that there is nothing that can be attained, with no reliance and no abiding, no subject and no object, without activating false thoughts—this is to realize bodhi. And when one realizes enlightenment, this is only to realize the fundamental Buddha of the mind. To pass through eons of effort is nothing but useless cultivation. Just as when the warrior attained his pearl he merely attained the pearl that was originally on his forehead, and this had nothing to do with his ability to seek elsewhere. Therefore the Buddha has said, “I have truly not attained anything in the ultimate bodhi.”