Can dead believers in Heaven intercede for the living?
For there is one God and one Mediator between God and men, the Man Christ Jesus
(1 Timothy 2:5)
I believe this verse alone is more than enough to answer the question. It clearly tells us Christ Jesus is the only Mediator between God and us. No saint, no prophet, no apostle, dead or alive, can assume that role.
But someone argued that the verse does not say there is only one “Intercessor”. Perhaps there is only one mediator but many intercessors?
Fair enough. Let’s take a look at what the Bible does say then…
Christ Jesus who died—more than that, who was raised to life—is at the right hand of God and is also interceding for us.
But He, because He continues forever, has an unchangeable priesthood. Therefore He is also able to save to the uttermost those who come to God through Him, since He always lives to make intercession for them.
What the Bible does say is that Jesus Christ, as our High Priest, is always interceding for us at the right hand of God the Father, and what it doesn’t say is anything about intercession from dead believers.
Thus, it stands to reason that our only Mediator is also our only Intercessor. Dead believers just do not or can not intercede for us.
(While Romans 8:26-27 talks about the Holy Spirit making intercessions for us through tongues, I believe it is the same as Jesus making them. After all, the Holy Spirit is the representative of our Lord to believers.)