If the Buddha could be said to have had any system of thought governing the whole trend of his teaching, it was what we may call radical empiricism. By this I mean that he took life and the world as they were and did not try to read them according to his own interpretation.
Suzuki identifies the Buddha’s methodological refusal of theoretical overlay as constituting a radical empiricism, making the term a bridge between Jamesian pragmatism and Buddhist soteriological practice.
, Essays in Zen Buddhism (First Series), 1949thesis