Persistence in Prayer

I have just had one of those experiences this evening where God spoke clearly to me. I was flicking through the tv channels, when I came across Christian Premier Radio and the subject matter covered everything I have read recently in the bible about prayer, persistence in prayer, meeting the conditions of prayer and praying for things that will give glory to god. I have something specific that I am praying for and indeed the speaker pointed out that prayer in the bible that God answered is always about specific things. He pointed out that we can claim the promises of God, but we must meet the conditions. I found it uplifting and reassuring.