The letter to this church also closes with an exhortation and a promise.  Hidden manna and a white stone in which is inscribed a new name are rewarded the overcomer.  The interpretations of this white stone have been various, but the difficulty seems to lie in determining which ancient custom is meant.  The most satisfactory to my mind is that contained in the following account by Mr. Blunt: 

“In primitive times, when traveling was rendered difficult from want of places of public entertainment, hospitality was exercised by private individuals to a very great extent, of which, indeed, we find frequent traces in all history, and in none more than in the Old Testament.  Persons who partook of this hospitality, and those who practised it, frequently contracted habits of friendship and regard for each other, and it became a well-established custom among the Greeks and Romans to provide their guests with some particular mark, which was handed down from father to son, and insured hospitality and kind treatment whenever it was presented.  This mark was usually a small stone or pebble, cut in halves, upon each of which the host and the guest mutually inscribed their names, and then interchanged with each other.  The production of these stones was quite sufficient to insure friendship for themselves or descendants whenever they traveled again in the same direction; while it is evident that these stones required to be privately kept, and the names written upon them carefully concealed, lest others should obtain the privileges instead of the persons for whom they were intended.”  So those who have obtained salvation and are overcomers through the blood have received the sure pledge of Christ’s eternal friendship (which those who know not God can not receive) and are invited to partake of all of his hospitalities, even to “eat of the hidden manna,” which is experienced by the truly sanctified.

    18.  And unto the angel of the church in Thyatira write; These
    things saith the Son of God, who hath his eyes like unto a flame
    of fire, and his feet are like fine brass;

    19.  I know thy works, and charity, and service, and faith, and
    thy patience, and thy works; and the last to be more than the
    first.

20.  Notwithstanding I have a few things against thee, because thou sufferest that woman Jezebel, which calleth herself a prophetess, to teach and to seduce my servants to commit fornication, and to eat things sacrificed unto idols.

    21.  And I gave her space to repent of her fornication; and she
    repented not.

    22.  Behold, I will cast her into a bed, and them that commit
    adultery with her into great tribulation, except they repent of
    their deeds.

23.  And I will kill her children with death; and all the churches shall know that I am he which searcheth the reins and hearts:  and I will give unto every one of you according to your works.

    24.  But unto you I say, and unto the rest in Thyatira, as many
    as have not this doctrine, and which have not known the depths
    of Satan, as they speak; I will put upon you none other burden.