Why God Sometimes Delays Your Answers to Prayer

I heard a story once about a young girl who wrote a letter to a missionary, trying to encourage him and lend her support. Evidently, she���d been told not to request a response to her letter because the missionaries were very busy. So when the letter arrived, the missionary got a kick out of reading, ���Dear Mr. Missionary, we are praying for you. But we are not expecting an answer.���