The fellow in our Gospel goes wrong, and not just because he desires only to "rest, eat, drink, and be merry!" (Lk 12:13-21). He tears down his barns. The more sensible, and spiritually appropriate, thing to do would have been to add on; to build an addition to his currently existing barns.
The barns in our Lord's parable, some spiritual writers claim, symbolize our lives. What we have "stored up" would be our possessions, our talents, our personality traits, the people and things in our life, and so on. The rich man is in transition (he has come into tremendous wealth) and wants total change. He destroys his previous identity, which were represented by the old barns.