{ 1 } - is not obscured by our own or society's sinfulness.
{ 2 } - is oriented to action rather than simple understanding.
{ 3 } - does not deal with ultimate problems of life and death.
{ 4 } - is not obscured by our emotions.
{ 5 } - does not deal with self-fulfillment and self-destruction.
{ 6 } - is theoretical rather than practical.

This is why it is called "practical," from the Greek word for action.