Passions

The church fathers speak of the passions.  These could be thought of as "the energy that moves us to do things."  What this really comes down to is that we so often, or even usually, do things because we "feel" like it.  What we eat and how much.  What clothes we wear.  What things we say.  The entertainment we choose to take in.  In most cases, we choose these things because we feel like it.
This is a problem.  It has become such a part us and in fact, it is the way we are inclined to live and move, because of our sinful nature, that it seems "normal".  But living by the passions is anything but normal.  It is not the way we are supposed to live.  Living by the passions is like a fish that wants to live out of the water, it only leads to death.
We must learn to motivated by and live by love for God and love for man.  Doing things because it is the right thing to do, because it is the loving thing to do, or both.  As we continue forward in our path of sanctification we will continually move towards being more like Jesus Christ and less like Adam.