Gospel love versus self righteousness fueled religion

What is the difference between someone who lives for Jesus out of love and someone who lives an outward religious, moral life...

I heard a pastor break it down into a very memorable thought...he asked the question.

Do you obey in order to be approved by God or do you obey because you already have been approved by God [because of what Christ has done for you by His suffering, death and resurrection]...here lies the great chasm.