Right now, the whole great universe in its profusion of myriad forms, up to and including each and every one of us, is at once medicine.

In ancient India, Manjushri once told a student to go outside and if he could find something that was not medicine, to bring it to him.  The student went outside and searched all over the ground but there was nothing that was not medicine.  Coming back in to Manjushri, the student said, "All over the ground, there was nothing that is not medicine."