Rebekah, was a spiritual woman when she prayed to become preganant. She acted in the flesh because she did not trust God to wait for his plan and wanted to help God move the plan along. On the other hand, she heard what God had to say about his plan, believed what she heard and decided to just walk by faith and not by sight and made something happen. Eventhough she did not see the plan, she watched and waited for the right opportunity to take what God promised her. Operating in the flesh, I see her as a deceiver and a liar and taught her child do the same thing.
I do believe that Isaac was a spiritual man because he obeyed the voice of God, eventhough he was deceived by both his wife and son Jacob.
I believe Issac was more spirtually sensitive becaues he did what God told him to do. God did not tell Rebecca to do anything. He just told her what would happen with the twinsl
Both Jacob and Esau were obedient to their parents. Jacob deceived and stole; Esau became rebellious and full of hatred for his brother so in this regard neither bother was spiritual.