"Except they be sent?"
(ean me apostalosin) "if they are not commissioned," sent with authority and a live-hood provided? Administrative and enlistment labors must be authorized. "By what authority doest thou these things?" is a proper question, Mar_11:28; Jesus sent the church, calls preachers, who then are sent by the church as missionaries, Mat_21:23; Mat_28:18-20; Joh_20:21; Act_1:8; Act_13:1-4; 2Co_5:18.
3) "As it is written," (kathaper gegraptai) "As it has been written," in harmony with the writing of Isa_52:7.
4) "How beautiful are the feet," (hos horaioi hoi podes) "How beautiful or desirable are the feet"; The idea is that of a runner, a courier, a news-bearer who brings good news - a message of help and hope and delivery.