Some people aren't very good at interpretation because they're not searching for truth or understanding but most interested in retreating back into a closed view of the world, a view that consoles them, perhaps insulating them from a bit of difficult self examination.   These people are well known for harboring grudges about very distant events.  I know one person for instance who still nurses resentment about being bulled nearly 50 years removed from the event. 

We should be growing interiorly until the day we die, getting more and more joyful as we leave behind - with God's grace - our pride, our self focus, our resentments, our vanity.

This joy is "osmotic" in a sense, because it is really God's joy passing through the now thinner and more permeable membrane of our soul.

To get to this state requires daily detachment, prayer, and frequent use of the Sacraments.   Interior struggle, but struggle done with God at our side, urging us on.