Jesus is laying down the rules of conduct for those who have his Spirit. Through the simple argument of these verses, he urges us to keep our minds filled with the idea of God’s control behind everything, which means that the disciple must maintain an attitude of perfect trust and an eagerness to ask and to seek. Jesus wants us to learn this way of reasoning: “God is my Father. He loves me. I will never think of anything he will forget. Why should I worry?”

Fix your mind on the idea that God is there. Once your thoughts are settled on this line, it becomes as easy as breathing to recall that your heavenly Father is behind everything that happens. Even when perplexities and difficulties press in on you, remembering the “much more” of your Father comes naturally and without effort. Before when troubles arose, you sought help from other people. Now, the notion of divine control is so powerfully formed in your mind that you go directly to God.

There will always be moments when God’s guidance is not at all obvious, moments when he does not lift the darkness. But trust him. Jesus said that God will appear at times like an unkind friend, but he is not (Luke 11:5–8). He will appear at times like an unnatural father, but he is not (vv. 9–13). He will appear at times like an unjust judge, but he is not (18:1–8). Keep the idea strong and growing in your mind that nothing happens unless God wills it. Rest in perfect confidence in him and learn to pray from this place of certainty. Prayer is not only asking; it is cultivating the frame of mind in which asking is perfectly natural. “Ask and it will be given to you.”

Wisdom from Oswald

There is no allowance whatever in the New Testament for the man who says he is saved by grace but who does not produce the graceful goods. Jesus Christ by His Redemption can make our actual life in keeping with our religious profession.
Studies in the Sermon on the Mount