The bible and its authors use some wildly vivid imagery to illustrate how the spiritual and physical worlds are in fact mushed together. Physical actions have spiritual repercussions and I’d go so far as to say the opposite is true as well. For those of us who have less than spectacular imaginations, I found this picture floating around on the interweb that helped me understand some scripture better (or at least more graphically).
And I will give them one heart, and a new spirit I will put within them. I will remove the heart of stone from their flesh and give them a heart of flesh. -Ezekiel 11:19
Put on the Lord Jesus Christ, and make no provision for the flesh, to gratify its desires. -Romans 13:14
I have been crucified with Christ. It is no longer I who live, but Christ who lives in me. And the life I now live in the flesh I live by faith in the Son of God, who loved me and gave himself for me. -Galatians 2:20