This quote cannot be found in Heaviside's corpus, Edge provides no reference, the quote first appears around the 1940s attributed to Heaviside without any references. The quote is actually a composite of a modified sentence from Electromagnetic Theory I (changing 'dinner' to 'eat'), a section header & later sentence from Electromagnetic Theory II, and the paraphrase of Heaviside's views by Carslaw 1928 ("Operational Methods in Mathematical Physics"), respectively