Physical resurrection makes more sense than just spiritual. It's very important. Without it, there is no Christianity.
40 There are also bodies in the heavens and bodies on the earth. The glory of the heavenly bodies is different from the glory of the earthly bodies. 41 The sun has one kind of glory, while the moon and stars each have another kind. And even the stars differ from each other in their glory.
42 It is the same way with the resurrection of the dead. Our earthly bodies are planted in the ground when we die, but they will be raised to live forever. 43 Our bodies are buried in brokenness, but they will be raised in glory. They are buried in weakness, but they will be raised in strength. 44 They are buried as natural human bodies, but they will be raised as spiritual bodies. For just as there are natural bodies, there are also spiritual bodies. ~1 Corinthians 15:40-44
When you don't have the resurrection of Christ in body, Christians who rise to heaven can't transform into their heavenly bodies because they (mainstream-many) believe that they will be taken up in their physical bodies. Their earthly bodies (like jesus) will die (as his Crucifixion) and be transformed to heavenly bodies. If you rose just in spirit, there is nothing to transform.
It's not just spiritual. That, to me, is so new age. I am not saying these things are facts. People believe whatever they choose. I'm just saying scripture does say he lived, died, and rose in flesh and transformed to spirit because earthly flesh cannot be in the kingdom of heaven.
This is a huge reason why Muslims, for example, can see the spiritual nature of christ but they know that they are not christians nor have the spirit of christ within because to do that you have to "be crucified in christ" as in galations.
Abdu'l-Baha is not one of the authors of the bible and he is not in the christian faith. So, you can't use that to support your statement because it is bias because of your beliefs compared to theirs. It is like using Muhammad's view of jesus as valid as if I were Muslim, I have authority to speak for scripture. I don't.
I only do because I have experienced it. If I had not became Catholic, I can't defend and say "christ is within" when I would not have been of that faith
specifically to claim christ is any more than what
the bible says he is not Abdu'l-Baha, Muhammad, or anyone else.
Without the physical resurrection, there is no resurrection in christ for christians. Unfortunately, a log of god-believers doesn't matter separate spiritual from physical. Why, I have no clue. The only Christians I know who don't are Catholics and Catholics are the ones who put the Bible together; so, I'd lean towards them not an outside party.