The basic idea of Zen is to come in touch with the inner workings of our being, and to do this in the most direct way possible, without resorting to anything external or superadded. Therefore, anything that has the semblance of an external authority is rejected by Zen. Absolute faith is placed in a man's own inner being. For whatever authority there is in Zen, all comes from within.

An Introduction to Zen Buddhism (ed. 1949)