Statesboro, GA, USA
A little bit off topic (from the problem of Evil, in general, to the problem of delayed or unanswered prayer in particular), but I wanted to post a link to a chapter of "The Training of The Twelve" by A.B. Bruce.
Might be of some interest to you Essorant ... though the chapter offers no quick fix, it is full of suggestive themes better suited for meditation than the ingestion of sound-bytes.
Here's a sample, speaking of Jesus' teachings on prayer via his "Parable of the Unjust Judge":
"The genial, kindly character of the argument is manifest from the insight and sympathy displayed therein. Jesus divines what hard thoughts men think of God under the burden of unfulfilled desire; how they doubt His goodness, and deem Him indifferent, heartless, unjust. He shows His intimate knowledge of their secret imaginations by the cases He puts; for the unkind friend and unnatural father, and we may add, the unjust judge, are pictures not indeed of what God is, or of what He would have us believe God to be, but certainly of what even pious men sometimes think Him to be. And He cannot only divine, but sympathize. He does not, like Job’s friends, find fault with those who harbor doubting and apparently profane thoughts, nor chide them for impatience, distrust, and despondency. He deals with them as men compassed with infirmity, and needing sympathy, counsel, and help. And in supplying these, He comes down to their level of feeling, and tries to show that, even if things were as they seem, there is no cause for despair. He argues from their own thoughts of God, that they should still hope in Him. 'Suppose,' He says in effect, 'God to be what you fancy, indifferent and heartless, still pray on; see, in the case I put, what perseverance can effect. Ask as the man who wanted loaves asked, and ye shall also receive from Him who seems at present deaf to your petitions. Appearances, I grant, may be very unfavorable, but they cannot be more so in your case than in that of the petitioner in the parable; and yet you observe how he fared through not being too easily disheartened' ...
For these reasons should all men pray, and not faint. Prayer is rational, even if the Divine Being were like men in the average, not indisposed to do good when self-interest does not stand in the way — the creed of heathenism. It is still more manifestly rational if, as Christ taught and Christians believe, God be better than the best of men — the one supremely good Being — the Father in heaven. Only in either of two cases would prayer really be irrational: if God were no living being at all, — the creed of atheists, with whom Christ holds no argument; or if He were a being capable of doing things from which even bad men would start back in horror, i.e., a being of diabolic nature, — the creed, it is to be hoped, of no human being."