Narrow door

Christ is the door.
Our struggle to expand our hearts to that of Christ makes the path seemingly narrow. 

But, it is the law we must add to our nature to go beyond letters to the understanding what God wills, and others might be expected to do.
The law of letters is about actions, the new law is about attitudes.
Narrow door is our sincere efforts to put on the attitudes of Christ.

Law and loving God

Loving God cannot be ensured by any law. It has to be grown in one's own depths.
Efforts for a virtuous life opens these depths as fertile soil, seeing all things in God's benevolence.
These efforts also include reflection, critical, intuitive, and creative.

Law must ensure this freedom, that its exercise facilitate loving God with all our heart, all our mind and all our strength. One who follows, and those ensure the accomplishment of the law must see that the law has opened ways of freedom for critical, intuitive and creative reflection.