The word explaining the seed in Mt 13:24-30 is the parable Jesus spoke of regarding what he had fulfilled at the First Coming and what he will fulfill at the Second Coming.
First, let us examine what was fulfilled at the First Coming.
God came to Jeremiah 2,600 years ago and prophesied what He will fulfill in the future, that the days are coming, when God will plant the house of Israel and the house of Judah with the offspring of people and of animals (Jer 31:27).
After about 600 years from that time, God who prophesied to Jeremiah came to Jesus (Jn 1:32; Mt 3:16) and sowed the seeds (the offspring of people, good seeds) in the field (Israel) through Jesus, and also the enemy came and sowed weeds, the offspring of animals, in the same field (Mt 13:24-25, 39). This animal stands for the Pharisees and the teachers of the law, thus pastors of that time. Why are they animals? They are like animals because they are ignorant pastors who do not know God, the Son of God and the Word (Prv 30:2-4; Is 56:10-12; Mt 23:33).
Jesus sowed good seeds, the seeds of God (Mt 13:24, 37), and the Pharisees and the teachers of the law sowed weeds, the seeds of devil (Mt 13:25, 39).
What is the seed? The word of God is the seed of God (Lk 8:11), the word of devil is the seed of devil. The spirit sowed his seed through his pastor. The place where it is sowed is the heart of men inside the church (refer to 1Cor 3:9, 16).
It was the house of Israel and the house of Judah (Jerusalem) where the seeds were sowed at that time.
Why did Jesus speak about the seed, the secrets of kingdom of heaven, in parables? God prophesied in Psalms that he would utter hidden things from of old in parables and send them to the next generation (Ps 78:2). After 1,000 years from that time, Jesus came and fulfilled the prophecy by proclaiming the secrets of kingdom of heaven in parables (Mt 13:34-35).
Another reason why he spoke in parables was to hide the secrets from the enemy (Mt 13:10-11). If you cannot understand this parable, you cannot be forgiven and saved, and you will become an enemy (Mt 13:1-13; Mk 4:10-13).
The time of the Second Coming is when those secrets are fulfilled and when the secrets are no longer spoken figuratively (refer to Jn 16:25; 1Cor 13:8-12).
There is no reason why the secrets are spoken in parable, because the entities of the prophecy have appeared.
Next, let us examine the things of the future, thus the Second Coming and the harvest. The sown good seeds are to be the sons of the kingdom and the weeds are to be the sons of the evil one (Mt 13:37-38). The harvest is the end of the age, the harvesters are angels, and the sharp sickles in the angel’s hand are the saints who have the word of God (refer to Mt 13:37-40, Rv 14:14-20).
There are two kinds of people. One kind is the wheat-like saints who have the seed of the word of God in their hearts. Another kind is the weed-like believers who have the seed of the word of devil in their hearts.
At the time of harvest, the weeds are tied to be burned first (Mt 13:30).
Who ties them? Their own pastors. Where are they tied to? To their churches. The tied ones are the sons of the devil who are born with the seed of the devil (refer to Mt 23:13) and they are to be thrown in the fire of hell (Mt 13:38-43). And then, the wheats, the sons of God, are gathered into the barn of God, that is Mount Zion (refer to Mt 13:30; Rv 14:1). They are the people who are saved at the time of harvest.
At the time of the harvest, rather than listening to one’s own pastor, believers must believe the word of harvesters who are the saviors according to the words of Jesus and be harvested into the place where there is salvation (Rv 14:1-4, 14-16, 1:3).