Intercessory prayer is prayer on behalf of another. But prayer of any type is conversation. I just can't talk to someone and expect them to do what I ask. It requires a relationship. and sometimes what I ask is wrong. praying on behalf of someone else - does several things. Firstly it demonstrates that you care for them. Secondly, it demonstrates that God is the one who can do something about it. But it also acknowledges that you know that God is the one who can do something about it. We don't know what God will do - but we ask - and this enables us to grow in faith.
I have a number of issues here: intercessory prayer is asking god to intercede. Mainly it's the last sentence: how do unanswered prayers enable you to GROW in faith? I'll lay it out a little more clearly. You find out, sadly, that a relative of yours has contracted Alzheimer's. If you believe God has a plan, then he PLANNED for this loved one to contract Alzheimer's, planned for you to be sad about it, so sad that you beg him to change his plan. Maybe. Because you don't know if that plan includes the idea that because your loved one got Alzheimer's, their having it may be the final piece of the puzzle to curing it. THAT could be the plan. OR, he planned for them to get Alzheimer's just because, or for any number of other reasons. Your praying for God to intercede in this plan, his own plan, would mean that you are trying to convince god to change his mind. This goes against him having a plan, number one, but number two, if you pray for him to save your loved one and they die, how does this unanswered prayer, with no indication of WHY it went unanswered, make your faith STRONGER? If a human being told you they were going to do something if you asked them to, you asked them to do it, then they didn't do it, didn't explain why they didn't do it, and furthermore you never heard from them again, would you trust this person more or less?
perhaps it is because we need faith and to grow in it. Perhaps we need to continue to realise that God is the master of the universe and we are dependant upon him. We ask him because he wants to us to tell him - what we want. I don't think that is cruel, even though I know he knows. Often God answers even when we don't ask him. but given that I love God and tell him anything - I don't have any reservations telling him again and again.
This doesn't answer the question about the point of intercessory prayer if god truly is omniscient, and instead, raises more questions than answers. Why does god want us to tell him what we want if he doesn't plan on doing anything about many, many, many of the prayers he hears? How is that not cruel: beg me for mercy and I'll let you labor under the illusion that I might grant it, even though I know already if I do or do not.
Of course God knew what humanity would do. it did not stop him because his plan included this - and in the end all of us will see why and simply marvel at his reasoning. man did not invent evil. Evil is not an invention. Evil is just disobedience.
If god's plan included man doing evil, knowing humanity would disobey, then why's he mad about it? It was HIS plan. This is one of the many arguments that opened my eyes to how contradictory all of this stuff is, this one and the talk about how Judas Iscariot burned in hell and was beset upon by demons. Wasn't he only doing what he was supposed to do IN GOD'S PLAN? Why get mad or punish him?