Metaphysical meaning of seed (rw)
seed--The creative idea inherent in the Word. Its nature is inherited from its parent source, God. The "seed," that is, "the word of God," is the real man--not the external thinking personality that has consciousness of separation, but the internal Spirit center. The seed is a generative center through which intelligence manipulates substance and produces form. In itself it is powerless to produce anything, but it is the avenue through which interior forces manifest in the outer. Man draws on the universal forces within and without, just as the tree draws on the invisible Spirit and earth, air, and water.
The illustration of the mustard seed is used to show the capacity of the apparently small thought of Truth to develop in consciousness until it becomes the abiding place of a higher range of thoughts (birds of the air).