"Then they took Jonah and threw him overboard, and the raging sea grew calm. At this the men greatly feared the Lord, and they offered a sacrifice to the Lord and made vows to him." NIV translation
Even though the sailors did not understand everything about God, they obeyed and threw Jonah overboard. Then, God showed up and calmed the storm. We see that then the sailors grew in their faith and knowledge as they "greatly feared the Lord". Then, they served Him with a sacrifice and vows. This very same pattern is true for those who come to Christ today. We don't have to understand everything to begin our walk with the Lord we just have to agree that God's way is the right way. When we obey, God will take care of the rest and we will grow in our faith and knowledge. With that faith and knowledge will come a love that draws us to serve Him more and more.
"But the Lord provided a great fish to swallow Jonah, and Jonah was inside the fish three days and three nights." NIV translation
What a picture of faith and deliverance! You see, when Jonah told the sailors to throw him overboard, he did not know that God would provide the big fish. This is and was such a wonderful picture of the death, burial, and resurrection of Jesus Christ and can remind us that it was God's plan all along. Jesus himself told the people who were looking for a sign that they would not get any except for "the sign of the prophet Jonah" (Matthew 12:38 - 40).