Are the soul and spirit easy to separate from the body?
No. The soul and spirit are pretty hard to separate from one another, but the physical body, the third part of man, is not that hard to separate from the soul and spirit. God can destroy the body, the temple, without touching the soul and spirit.
Les explains that the soul and spirit are closely connected and are pretty hard to separate. By contrast, the body, the third part of us, is not that hard to separate from the soul and spirit. So when Scripture speaks of God destroying the temple, it means the physical body, not the soul and spirit. He illustrates this with 1 Corinthians 5:5, where Paul delivers a man to Satan for the destruction of the flesh, not the soul and spirit.