Isaiah 28:25 (b) In this passage types are used to illustrate the preaching of the Gospel, the harvesting of souls, and the use of the person after he is saved.
The fitches represent some of the things that accompany the Gospel. The wheat represents the saving message of the Gospel.
The four other grains may represent songs, prayers, humbleness of mind, and acceptance of the Word, all of which do usually accompany the preaching of the Gospel. GOD's Gospel must occupy the principal place in all of our ministry to the lost. For that reason, the wheat is to be planted in the principal places in this allegory.