If you had a trial pending for your estate, and your heart was distracted with cares and fears about the result, yet someone very skilful and faithful assumed responsibility for your case, what a relief it would be to you! If he were to say to you, "Do not trouble yourself about this business, do not lose an hour's sleep over this matter, commit it to me, and trust me with its management," what a burden would be lifted as soon as you committed the matter to him! You would be able to eat with pleasure and sleep in quietness. Committing the matter of your fear to God would give much more ease and quietness. His power, wisdom, and faithfulness are greater than anything found in people.
Worrying is carrying tomorrow's load with today's strength- carrying two days at once. It is moving into tomorrow ahead of time. Worrying doesn't empty tomorrow of its sorrow, it empties today of its strength.
We walk into the future in God-glorifying confidence, not because the future is known to us but because it is known to God. And that's all we need to know. Worry about the future is not simply a character tic, it is the sin of unbelief, an indication that our hearts are not resting in the promises of God.
It is a reproach and dishonor to Christ to fill our heads with distracting cares and fears when we have so wise a Head to consult and work for us.Triumphing Over Sinful Fear, 106
It is not the dead but the living world that puts our hearts into fear and trembling. If our hearts were crucified, they would soon be calmed.Triumphing Over Sinful Fear, 85
We must never for a second worry about anything that cannot be affected or changed by us. It is a waste of energy. If you can do nothing about a situation stop thinking about it; never again look back at it, never think of it.Spiritual Depression (82)