A preoccupation with material things is not only wrong if those things are luxury items. A person can be wrongly preoccupied with material things even when those things are basic necessities. Jesus continued:
For this reason [that is, based upon what I just said] I say to you, do not be anxious for your life, as to what you shall eat, or what you shall drink; nor for your body, as to what you shall put on. Is not life more than food, and the body than clothing? Look at the birds of the air, that they do not sow, neither do they reap, nor gather into barns, and yet your heavenly Father feeds them. Are you not worth much more than they? And which of you by being anxious can add a single cubit to his life’s span? And why are you anxious about clothing? Observe how the lilies of the field grow; they do not toil nor do they spin, yet I say to you that even Solomon in all his glory did not clothe himself like one of these. But if God so arrays the grass of the field, which is alive today and tomorrow is thrown into the furnace, will He not much more do so for you, O men of little faith? Do not be anxious then, saying, “What shall we eat?” or “What shall we drink?” or “With what shall we clothe ourselves?” For all these things the Gentiles eagerly seek; for your heavenly Father knows that you need all these things. But seek first His kingdom and His righteousness; and all these things shall be added to you. Therefore do not be anxious for tomorrow; for tomorrow will care for itself. Each day has enough trouble of its own (Matt. 6:25-34).
Many readers of this book will not be able to relate at all to the people Jesus was addressing. When was the last time you worried about having food, drink or clothing?
However, Jesus’ words certainly have application to us. If it is wrong to be preoccupied with the essentials of life, how much more wrong is it to be preoccupied with nonessentials? Jesus expects His disciples to be primarily focused on seeking two things: His kingdom and His righteousness. When a professing Christian can’t afford to tithe (an old covenant commandment I might add), but can afford many non-essential material things, is he living up to Christ’s standard of seeking first His kingdom and righteousness?