I know where you are going with this

; no, there is no issue with asking anyone in this life, a friend, family member or our Pastor to pray for us. In doing so, it is my hope that they would bring my request to Jesus Christ, not one or more of the Saints, as I know that Jesus Christ hears the prayers of all the faithful.
From Revelation, it seems that those who have gone before us do offer praise and intercessions before Christ; just as we do in our Churches here on earth, for we do model our worship on the examples set before us in Scripture.
The issue in using that Scripture as a prooftext to not ask the saints in heaven for prayer is the implication that it is a denial of the role of Jesus Christ as being the sole mediator between God and man. If that's true, consistency would demand that asking people on earth for prayer would be problematic in the exact same way.
I'm glad you agree that those in heaven are offering intercessions before Christ.
What we are not certain of is that those who have gone before us can hear us. It's likely that they, having lived their earthly lives, are aware of the needs of mankind and that the intercessions that they offer are of a general nature. It's possible (but not certain) that they may be able to look down upon us from heaven and see what we need, and offer intercessions for us. It is even possible (but in light of Scripture, unlikely) that they can hear us, and will intercede for us, based on our requests to do so.
It is certain that they are aware enough of us to 'surround' us (Hebrews 12:1). It is certain than when we approach the throne of grace in prayer in the New Jerusalem, that they are present and we also approach them (Hebrews 12:23). You concede they intercede for us. We know they have no 'ears' but few would profess that means they cannot communicate with each other because of this. Communication for them is certainly not in a physical sense, and therefore not limited by time or space. So how do you profess that it's unlikely they can hear us?
All that we know for certain is that this practice is based on tradition only; there is no support for this practice in Scripture. DiligentlySeeingGod provided these quotes; and there are many others:
There is certainly support in the Jewish tradition of praying at Rachel's tomb which has been deeply imbedded in Jewish culture for centuries before Christ and continues to this day. Jesus and the apostles never condemn this practice; Matthew in all practicality confirms it when he cites Jeremiah and Rachel weaping for her children as he records the massacre of the innocents. There is no condemnation of the practice in Scripture, and there certainly is implicit support in Matthew's reference to Rachel with no condemnation.
And neither of those Scriptures are ever interpreted to mean that we cannot or should not ask another Christian to pray for you. Unless of course, they're dead. That seems to be the qualifying factor -- if you approach a Christian living on earth to pray for you it in no way contradicts Christ as being the sole mediator between God and man. If you ask a Christian living in heaven to pray for you -- it does. There is no logic in that.
Seeing how God's Holy Word directs us to approach God, one can only conclude that asking the saints to intercede for us is at odds with Scripture.
We do know from God's Holy Word, without any doubt, that we can and should ask Jesus Christ to take our prayers to God the Father.
Only if asking the saints on earth to intercede for us is at odds with Scripture. This not an either/or. I know of no one who asks the saints for intercession who does not also approach God directly. It is not a substitute for approaching God anymore than you would see asking someone else to pray for you as such.
So yes, we do indeed know from Scripture that we can and should approach God directly.
Now, I doubt that God would punish faithful Christians for asking a saint(s) to pray for for them; but it's entirly possible that such requests may be falling on deaf ears, and that such a request may be unfulfilled.
Narnia, you also posted this:
No argument here, except that when we look at the context, it seems most apparent that St. Paul is talking about the Church on Earth; nowhere does it lead us to believe that St. Paul is speaking of the faithful departed saints as well.
Pax Domini
There are not 'two' bodies of Christ. There is one body of Christ, and it consists of those who are in heaven and on earth:
Colossians 1:
18
He is the head of the body, the church; he is the beginning, the first-born from the dead, that in everything he might be pre-eminent. 19 For in him all the fulness of God was pleased to dwell, 20
and through him to reconcile to himself all things, whether on earth or in heaven, making peace by the blood of his cross.
And St. Paul is clear in his teaching on this one body of Christ that:
"The eye cannot say to the hand, 'I have no need of you'" (1 Cor 12:21). If we truly believe the one body of Christ consists of those both in heaven and earth, we cannot deny that we have need of those saints in heaven.
And he says "
That there should be no schism in the body; but that the members should have the same care one for another. And whether one member suffer , all the members suffer with it ; or one member be honoured, all the members rejoice with it." (1 Cor 25:26)
So do you believe there is only one body of Christ, and it consists of those in heaven and on earth? Are St. Paul's words about the body of Christ true -- do we need them? Is there truly no schism/division in the body? Professing that it's okay to ask members of the body on earth to pray for us but not those in heaven most definitely creates a division, yet St. Paul says there is none. Do you believe they care for us? Suffer with us? Rejoice with us? How -- unless they are aware of our concerns?
Or is the concept of the body, of which Christ is the head and reconciled heaven and earth into this one body merely one of nice poetic imagery but in no way a practical reality?