At what point does the soul leave the body?

So much of our present-day difficulties and false teaching and downright unbelief could be easily demolished with a more intelligent and modern interpretation of set forms and expressions. 

The resurrection of the body is still interpreted as a coming to life again of the physical body that is put away as a worn-out garment when the ego has finished with it, however distant that event may have been or under what conditions it happened! 

Could anything be more absurd? No thinking man can believe that bodies, which have crumbled to dust thousands of years ago, their graves vanished and every trace gone, are coming out of the ground in those very bodies at what they describe as the sound of the last trumpet!