Zen

From the first not a thing is

Attributed to the 6th Patriarch of the Zen school, Huineng

D.T Suzuki described Huineng's teaching here as a bomb because of it's implications, and I think he's right. It is the ultimate preclusion of form, doctrine, practice, mental objects, etc.

There are questions about the authenticity of much of the record attributed to huineng, but either way this teaching gets echoed by other zen masters through the centuries