In connection with the editorial, "Happiness, Vital Factor in Extending Life," in your issue of August 12, in which is set out the opinion of the medical director of the Life Extension Institute, as expressed in the August issue of the Review of Reviews, please permit me to make a distinction between Christian Science and Couéism for the benefit of your readers, who could easily infer, from the manner in which the doctor links them together, that they are similar, if not one and the same thing.