So do not worry, saying, ‘What shall we eat?’ or ‘What shall we drink?’ or ‘What shall we wear?’ For the pagans run after all these things, and your heavenly Father knows that you need them. But seek first his kingdom and his righteousness, and all these things will be given to you as well. Therefore do not worry about tomorrow, for tomorrow will worry about itself. Each day has enough trouble of its own. Matthew 6:31-34
“Anxiety and care, hurry and worry, these God-dishonoring works of the flesh are ever coming up again. How true George Mueller used to say: “Where anxiety begins faith ends, where faith begins anxiety ends.” The lesson can only be learned in constant dependence upon Him in seeking the things which are above.
We are then utterly helpless in ourselves. Alas! how often we look in our anxiety, in sickness and in health to something in ourselves and to men and man’s help and not to Him in whose hands we are so securely and leave it all with Him, committing our way unto the Lord.
And all this is applicable to even the smallest matters of the daily life. Seeking then first of all the kingdom of God and His righteousness—that is, the things which are above—the promise is given, all things shall be added unto you.
And there is another characteristic about anxiety. It looks unbelievingly ahead. Unbelief draws dark pictures of despair and occupies the mind with a day which may never come. How different it ought to be and will be if we but follow His word.”
A.C. Gaebelein (1861-1945) cites George Mueller (1805-1898) in The Gospel of Matthew: An Exposition (New York: Our Hope Publication Office, 1910) 148-149.