"He said this to test him, for he himself knew what he would do." -- John 6:6
Have you ever asked someone a question just to hear what they would say? You already knew the answer, but you were interested in knowing the thoughts of the other person. At times such answers will reveal more than just thoughts; they might open the door to their entire belief system... or unbelief.
Jesus wanted to test the faith and vision of Philip with his question. The Lord will also press our hearts with questions that rise from our time in the Word and prayer. He has already decided what He will do and how He will do it, but He probes our hearts. This is a time for deeper faith and spiritual growth.
Don't just passively read and pray my friend. Pay close attention to the questions that rise and allow time to open your heart to the Lord. Make room for God to do greater things than you have seen before and never place limits through unbelief. Remember... they gathered twelve baskets of fragments from the five barley loaves.