How do we know the concept of spiritual seed is true?

The scriptural basis for the concept of spiritual seed comes from various passages that highlight our regeneration through Christ. In 1 Peter 1:23, it states that we are born again not of corruptible seed but of incorruptible seed, which is Christ Himself. This means that our spiritual life is derived from Jesus, who embodies eternal life. The union we have with Christ enables this seed to manifest in our lives, showing that spiritual descendants, or those who bear the image of Christ, are genuinely part of His family. This theme of producing after one's kind is essential in understanding our identity as children of God and the spiritual generational line established in Christ.