In Mark 4:1-20, Jesus used a parable to teach that the Word of God is like seed, and the condition of our hearts determines the fruitfulness of what is produced. Pastor Isaiah explains that while some hearts are hard, shallow, or distracted by the world, others are "good soil," ready to receive and respond. The call of Christ is not just to hear the Word, but to receive it, reflect on it, and let it take root in order to produce lasting spiritual growth!