God knows our hearts better than we do and He knows what we need better than we do. So, it's often the case that God will put us in different kinds of situations in order to expose some form of sin our lives. This is what we see Him doing to Jonah here at the beginning of chapter 4. Jonah has some sin tucked deep within his heart and God is bringing it to the surface so that it may be seen and repented of. May we continually ask God to do this with us!