Ludwik Lejzer Zamenhof, Dr. Esperanto's International Language… (2006)
“ Nothing actually prevents people from inducing their friends and acquaintances to sign a promise in any cause, yet how few, as a fact, ever do sign anything, be the object ever so important and advantageous to mankind. More especially, when, as in the present instance, the act of signing, while contributing to the realization of a sublime ideal, at the same time requires no moral nor material sacrifice, can one see no very clear grounds for a refusal.Doubtless, no one has anything to say, in general, against the introduction of an international language ”
