‘This teaching of ours has first taken non-thought as its essential doctrine, the formless as its essence, and non-abiding as its fundamental. The formless is to transcend characteristics within the context of characteristics. Non-thought is to be without thought in the context of thoughts. Non-abiding is to consider in one’s fundamental nature that all worldly things are empty.’
There is nothing we can really add to this, even after many centuries of human ‘progress’.