“But seek first the kingdom of God and His righteousness, and all these things shall be added to you.” Matthew 6:33
Here is a double argument against the sin of thoughtfulness. Take no thought for your life, the life of the body, for you have greater and better things to take thought about–the life of your soul, your eternal happiness. That is the one thing needful about which you should employ your thoughts, and which is commonly neglected in those hearts wherein worldly cares have the ascendancy. If we were but more careful to please God and work out our own salvation, we should be less solicitous to please ourselves and work out an estate in the world. Thoughtfulness for our souls is the most effectual cure for thoughtfulness for the world. Also, you have an easier and more sure way to obtain the necessities of this life than by fretting about them, and that is by seeking first the kingdom of God. Do not say that this is the way to starve. No, it is the way to be well provided for, even in this world.
It is the sum and substance of our whole duty. We must mind heaven as our end and holiness as our way. We must press toward it, give diligence to make it sure. We must prefer heaven and heavenly blessings before earth and earthly delights. Let care for our souls and another world take the place of all other cares.
“And all these things shall be added unto you.” You shall have what you seek, the kingdom of God and his righteousness, for never anyone sought this in vain that sought it in earnest. And over and above this, you shall have food and raiment besides. What a blessed change would it make in our hearts and lives did we but firmly believe this truth, that the best way to be comfortably provided for in this world is to be most intent upon another world! If we give diligence to make sure to ourselves the kingdom of God and the righteousness thereof, the Lord will provide as much of the things of this life as he sees good for us, and more than that we would not wish for.
“The morrow shall take thought for the things of itself. Sufficient unto the day is the evil thereof.” We must not perplex ourselves inordinately about future events, because every day brings along with it its own burden of cares and grievances. This does not forbid a prudent foresight and to prepare accordingly, but forbids perplexing solicitude and anxious thoughts over difficulties and calamities which may perhaps never come or, if they do, may be easily borne. What a folly it is to take upon ourselves today bycare and fear that trouble which belongs to another day and which will never be the lighter when it comes!
The conclusion of the whole matter is this: It is the will and command of the Lord Jesus that his disciples should not be their own tormentors nor make their passage through this world more dark and unpleasant by their apprehension of troubles than God has made it by the troubles themselves. By our daily prayers we may procure strength to bear us up under our daily troubles and to arm us against the temptations that attend them. – Matthew Henry