Even in the midst of all kinds of persecution at the time of early churches, the apostle Paul preached the gospel diligently. How could he do so? Foremost, the one who accepts Jesus Christ, receives forgiveness of sins and dwells in the Word of God is able to enjoy true happiness and joy that cannot be exchanged for anything of this world. The person who is filled with this happiness becomes passionate in spreading Gods love and Jesus Christ as the Savior to those who do not know God. This is because he realizes the heart of God who "desires all men to be saved and to come to the knowledge of the truth" (1 Timothy 2:4).