Ancient Greek and Roman physicians invoked nature, claiming that the proportions of the various humors or fluids in the bodies influenced personality.
Matt himself humors his skeptics at a recent conference in this clip, which obviously shows that (despite the opinion of the writer's article surrounding it) Matt is not only for real, he has a great sense of humor as well.
The concept of the humors is not unfamiliar to most people in the English speaking world.
The humors pop up again in psychology and even in educational circles as advocated by the scholar Rudolf Steiner.
Tibetan medicine teaches that the body is ruled by three humors known as rLung, mKrhispa and Badkan, roughly translated in English as wind, bile and phlegm, respectively.
When the tridosha falls out of balance, the patient develops illness associated with the humors.
When these humors are working in balance, all is well and the individual is healthy.