Revelation 2:17 "He that hath an ear, let him hear what the Spirit saith unto the churches; To him that overcometh will I give to eat of the hidden man'-na, and will give him a white stone, and in the stone a new name written, which no man knowth saving he that receiveth it."
"Manna" is angel food for the spiritual body, it is what God fed the children of Israel while they were in the wilderness.
The "manna" of today is the spiritual truth within the Word of God that feeds your spiritual body and mind. The "white stone" is a stone of victory, it is given to God's elect who are the over-comers. They overcame the deceit of the Antichrist, and the Kenites.
If you have an ear to hear, you will understand what the spirit is trying to teach you. This instruction is given for us by Jesus, with John doing the writing.