How do we know the Gospel is effective in bringing salvation?

The effectiveness of the Gospel in bringing salvation is rooted in its divine origin and purpose. According to Romans 1:16, the Gospel is the power of God for salvation to everyone who believes. In the parable of the sower, Jesus illustrates that the seed, which represents the Word of God, is sown in various types of hearts, and only the good soil brings forth fruit, demonstrating genuine faith. This reflects God's sovereign choice in who will receive the message and be transformed by it, emphasizing that salvation is a work of God, not of man.