What is the symbolism of the serpent and the serpent seed?
Answer: Serpent symbolizes deception and the seed or products of it were jealousy, hatred, lust, sadness, etc.
In short, from one single act of deception begot different kind of bad spirit that man is capable of manifesting i.e. jealousy and hatred resulted in the act of murder hence, the Cain and Abel case.
Now, in Gen 3:14, it says, the serpent on the belly shall go, meaning the serpent will crawl. What does this mean? When deception attacks, it crawls slowly until fully manifested. The verse also said that the serpent will eat dust all the days of his life, eating dust is a metaphor used in racing which means, outperform, outrun or someone who is left behind. Deception no matter how far it crawls, at the end of the day, it will be left behind, deception has no place in the kingdom of heaven.
In Gen 3:15, the woman represents the bride of Christ or the church, church also is an individual, it’s like one big circle, inside of it are small circles, the small circles inside the big circle are also called a circle, likewise, an individual inside THE church is also called a church. The bride of Christ (Woman) has enmity or despise deception (Serpent). The woman (bride of Christ) seed is the fruit of the spirit in Gal 5:22-23 and the serpent seed are the opposite of what Gal 5:22-23 had mentioned.
The serpent seed symbolises the opposite of love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, self-control, it crawls and attacks the weak spots of the bride of Christ seed, heels symbolize weak spots similarly like Achilles heel, meaning, when the bride of Christ produces love, hatred may crawl and attack the weak spots but if you know LOVE through Jesus Christ, it can be crushed.
For literal sense interpretation, click the link below.