The phrase "do not worry" suggests a greater-than-normal concern about managing what we possess. Jesus directs this admonishment toward everyone because, no matter how much we possess, the drive to get more remains, along with insecurity about losing what we already have. He is not saying we should be unconcerned about the quality of what we eat; His concern is that we worry too much about whether we will have anything to eat.
Our focus, though, is on His statement that life is more than food and clothing. It indicates that stability and serenity of mind must come from within a person, not from outward, physical provisions. To set one's heart on material possessions or to worry about the lack of them is to live in perpetual insecurity. This approach to life is a sure-fire way to deprive ourselves of a major blessing of life God wants us to enjoy. His calling enables us to live an abundant life in peace and joy. In order to do this, we must be weaned away from our overwhelming dependence upon physical things. In other words, we will not find balanced emotional stability unless and until our minds are fed with a nutritious, spiritual diet.
John W. Ritenbaugh
Eating: How Good It Is! (Part Three)
In Luke 12:13-21, a listener in the crowd surrounding Jesus asks Him to instruct his brother to divide the inheritance due to him equitably. Jesus declines, saying that life should not be based on having many possessions. He uses this occasion to teach His disciples that a godly life is more important than material things. To explain this, He tells a parable about a rich man who builds larger and larger barns to store all his crops and goods.
Since he had everything he could possibly want or need, the rich man's focus was on living an easy life. God's response is that the man was foolish because, when he died later that night, his goods would do nothing for him. Someone else would inherit and enjoy them. A person whose life is caught up in what he owns is not rich toward God. The Parable of the Rich Fool illustrates Jesus' teaching to guard against every kind of covetousness.
Martin G. Collins
Parable of the Rich Fool