Regarding the points you refer to in your letter: the
complete and entire elimination of the ego would imply perfection--which man
can never completely attain -- but the ego can and should be ever-increasingly
subordinated to the enlightened soul of man. This is what spiritual progress
implies.
(From a letter dated 14 December 1941 written on behalf of Shoghi Effendi
to an individual believer; The Compilation of Compilations, vol. II, Living the
Life)