ARE YOU CALLING JESUS AN INDIAN GIVER?! Hahaha...in all seriousness, those aren't the Keys to the Kingdom of Heaven, they are the keys to Hades/Sheol. Now, you may say "same difference" but I disagree. The Keys to the Kingdom (given to Peter, but more on that below) have the power to bind and loose on Earth - not beyond. As such, Jesus never gave up the keys to the place where souls who had already departed Earth resided - Sheol.
There's the problem with keeping the keys separate from binding and loosing. Bind and loose are associated directly with the keys in Matt. 16:18, and then he uses the same language in Matt 18:18, it has to be referencing the power of the Keys.
Yes, the power of the Keys is the power to bind and loose - but the authority conferred by the transfer of the Keys rather than just the power is tantamount. More on that below.
What was the point of the House of David? What was the point or the lineage of David? Jesus. He is the everlasting King in the line of David, and the authority. But what does he do? He asks us, starting with the disciples, to let others into the kingdom of God. What does He give for that purpose? A helper (the Holy Spirit) and Keys to the Kingdom of Heaven--the Gospel. Both are right next to each other in John 20:22-23.
I completely agree the House of David and his line was for Christ. But the imagery of the key is tantamount. In Isaiah, the transfer of the key was the vesting of authority over the Kingdom of Judea in the absence of the King - it established him as a steward. As such, it was a transfer of authority. If the real Keys were the Gospel, as you argue, why would Jesus solely charge the Twelve with this? Why would he exclude his other followers - Mary, His mother, Mary Magdeline, plus the countless others who believed in Him? It seems to me that the transfer of Keys was a vesting of authority, as it was in the Hebrew Scriptures.
I agree they are different keys. I just put it up as a joke.
But the imagery of the key is tantamount. In Isaiah, the transfer of the key was the vesting of authority over the Kingdom of Judea in the absence of the King - it established him as a steward.
I agree here
If the real Keys were the Gospel, as you argue, why would Jesus solely charge the Twelve with this?
I don't think there is exclusivity with this. Of course, whoever the original 12 baptized could then go on and baptize others. They wouldn't be good Christians if they didn't. I think that all Christians have the keys and they are linked with the Holy Spirit. We are not only to have our sins forgiven and enter heaven, but also to tell others and let them into the Kingdom.