There is a brief passage in Psalm 55:22 which reads: “Cast your burden upon Jehovah, and he will sustain you: he will never suffer the righteous to be moved.”
Follow this advice. Let not your burden rest upon yourselves; for you cannot bear it, and must finally perish beneath its weight. But, confident and full of joy, cast it from you and throw it on God, and say: "Heavenly Father, You are my Lord and God, who did create me when I was nothing; moreover has redeemed me through Your Son. Now, You have committed to me and laid upon me, this office or work, and things do not go as well as I would like. There is so much to oppress and worry, that I can find neither counsel nor help. Therefore I commend everything to You. Supply counsel and help, and be everything in these things."
Such a prayer is pleasing to God, and he tells us to do only what we are commanded, and throw upon him all anxiety as to the issue and what we shall accomplish. As also other passages of Scripture declare: “Commit your way to Jehovah, trust also in Him, and He will bring it to pass,” -Psalm 37:5.
No heathen, philosopher, jurist, if he have not God’s Word, can throw his care and complaint upon God. He thinks that all the world, especially the great, the wise, who rule, must accomplish everything by their own planning and circumspection. And where trouble arises—for it is quite common for even the greatest- and wisest people to make mistakes— he becomes a madman or a fool, and begins to murmur and argue against God and his government, as though God’s rule merited criticism. But such men receive their deserts when God permits their calculations and hopes to fail, and lets the reverse obtain. For they will not admit they have need of him. They think they have sufficient wisdom and power, and that God must respect their plans. Thus, they spend their lives in many vain, useless cares and projects, and must, in the course of their experience, learn and confess, many a time, that the very opposite of their judgment is the truth.
Christians have the rare faculty, above all other people on earth, of knowing where to place their care, while others vex and torture themselves and at length must despair. Such must be the consequence of unbelief, which has no God and would provide for itself. But faith understands this word from the Scriptures: "casting all your anxieties on him, because he cares for you." [1 Peter 5:7] It joyfully meditates on it and does and suffers faithfully. For faith knows this to be its duty. Its trouble, however, it commits to God, and proceeds with vigor against all that opposes. It can call upon God as a father, and it says: I will do what God has commanded me and leave the result with him.
[This is an excerpt from a sermon preached by Martin Luther]