Sometimes, understanding the writings of Paul are hard, because unlike the Gospels of Matthew, Mark, and John; Paul was only privileged to see Jesus in his Spiritual form and not his physical form.
It is also unlikely that Luke met Jesus in his physical form, but Luke wrote his Gospel and Acts after spending much time with those who had, and especially the mother of Christ herself.
Paul on the other hand was only acquainted with the Holy Spirit, which Jesus promised:
John 14:26 NKJV But the Helper, the Holy Spirit, whom the Father will send in My name, He will teach you all things, and bring to your remembrance all things that I said to you.
Paul's writings are similar to our writings today in that we concentrate on the Spiritual aspects and are unencumbered by the Physical aspects of a living material Jesus.
Therefore; we must accept that Paul would only be able to see Jesus and all aspects of Christianity from a Spiritual point of view.
The Heavenly realm as he saw it was purely Spiritual, and all things were to him: as they are to most Christians I know regardless of Denomination: based on future rewards, and the only thing the present has to do with it, lies in the fact that Salvation is a now thing. All else is future reward, and so to Paul (and so is my concept of Heaven) totally Spiritual and begins at salvation, and continues without end; even though all things material will end.
Revelation 21:1 NKJV Now I saw a new heaven and a new earth, for the first heaven and the first earth had passed away. Also there was no more sea.
This my Southern Baptist point of view, and my understanding of things as seen through that concept. Others may agree or disagree.