The woman in today's gospel in Jesus' parable apparently had taken one on the chin. We don't know what her problem was. We are not given the details. But that's because it is unimportant what her exact problem was. This parable teaches us the answer, through the example of a person that could have stayed down, could have thrown in the towel, could have given up, but chose not to.
Persistent prayer knocks out despair.
Persistent prayer may not solve the particular problem that you have, but it will knock out the despair surrounding it and many times it will solve the particular problem that you have. Should always pray. In one small town, a tavern opened up right next to the church. And they prayed. Well, that night lightning came and struck the roof of the tavern and it burned down.