It is better to be over-cautious than over-dogmatic when considering the miraculous and the supernatural. It is useless for people to set up limits for what is or is not possible in Nature. To do so would mean that they have got a full knowledge of Nature's laws--a claim nobody dare make in these days and expect any sensible person to accept it. We have lived to see several nineteenth-century so-called laws of Nature abrogated by man himself, not to speak of earlier ones like the "laws of gravity."
-- Notebooks Category 21: Mentalism > Chapter 5: The Key To the Spiritual World > # 61