The Blue Cliff Record A Book by Yuanwu Keqin, Thomas Cleary & J.C. Cleary www.shambhala.com Mountains are mountainsNo door at which to knockThe miraculous bones of the ancientsWhat did you see when you were there?I have pacified your mind+2 More zeneuphony
Caustic (optics) Caustics made by the surface of water. In optics, a caustic is the envelope of light rays reflected or refracted by a curved surface or object, or the projection of that envelope of rays on another surface. The caustic is a curve or surface to which each of the light rays is tangent, defining a boundary of an envelope of rays as a curve of concentrated light. Wikipedia en.wikipedia.org Architectural CausticsCaustic Engineering caustics