John Chrysostom
He said not ‘God knoweth,’ but, Your Father knoweth, in order to lead them to higher hope; for if He be their Father, He will not endure to forget his children, since not even human fathers could do so. He says, That ye have need of all these things, in order that for that very reason, because they are necessary, ye may the more lay aside all anxiety. For he who denies his son bare necessaries, after what fashion is he a father? But for superfluities they have no right to look with the like confidence.
And He said not, Shall be given, but, Shall be added, that you may learn that the things that are now, are nought to the greatness of the things that shall be.
Since their belief is that it is Fortune and not Providence that has place in human affairs, and think not that their lives are directed by God’s counsel, but follow the uncertain chance, they accordingly fear and despair, as having none to guide them. But he who believes that he is guided by God’s counsel, entrusts his provision of food to God’s hand; as it follows, for your Father knoweth that ye have need of these things.
Thus then let him who believes himself to be under the rule of God’s counsel, commit his provision into God’s hand; but let him meditate of good and evil, which if he do not, he will neither shun the evil, nor lay hold of the good. Therefore it is added, Seek ye first the kingdom of God, and his righteousness. The kingdom of God is the reward of good works; His righteousness is the way of piety by which we go to that kingdom. If then you consider how great is the glory of the Saints, you will either through fear of punishment depart from evil, or through desire of glory hasten to good. And if you consider what is the righteousness of God, what He loves, and what He hates, the righteousness itself will shew you His ways, as it attends on those that love it. And the account we shall have to render is not whether we have been poor or rich, but whether we have done well or ill, which is in our own power.
The earth for man’s sin is accursed that it should not put forth fruit, according to that in Genesis, Cursed is the ground in thy works; but when we do well, then it is blessed. (Gen. 3:17.) Seek righteousness therefore, and thou shalt not lack food. Wherefore it follows, and all these things shall be added unto you.