Matthew 6:34

Take therefore no thought for the morrow That is, for futurity, according to the Hebrew idiom, as the word is used, Genesis 30:33. Since the extent and efficacy of the divine providence is so great, and since you are the objects of its peculiar care, you need not vex yourselves about futurity. For the morrow shall take thought for the things of itself That is, be careful for the morrow when it comes. Sufficient unto the day is the evil thereof Speaking after the manner of men. Every time has abundant necessary troubles of its own; so that it is foolish to increase present distresses by anticipating those that are to come, especially as by that anticipation it is not in your power to prevent any future evil. All trouble, however, is upon the whole a real good. It is good physic which God dispenses daily to his children, according to the need and strength of each. Here we may reasonably reflect, with the pious Dr. Doddridge, How kind are these precepts! The substance of which is only this, Do thyself no harm! Let us not be so ungrateful to him, nor so injurious to ourselves, as to harass and oppress our minds with that burden of anxiety, which he has so graciously taken off. Every verse speaks at once to the understanding, and to the heart. We will not therefore indulge these unnecessary, these useless, these mischievous cares. We will not borrow the anxieties and distresses of the morrow, to aggravate those of the present day. Rather we will cheerfully repose ourselves on that heavenly Father, who knows we have need of these things; who has given us the life, which is more than meat, and the body, which is more than raiment. And thus instructed in the philosophy of our heavenly Master, we will learn a lesson of faith and cheerfulness from every bird of the air, and every flower of the field.