Matthew 6:34 KJV says, "Take therefore no thought for the morrow: for the morrow shall take thought for the things of itself. Sufficient unto the day is the evil thereof."
That verse is not telling you to be careless. It is telling you not to drag tomorrow into tonight like it belongs in your bed. Tomorrow has its own weight. Tonight has its own mercy.
Overthinking often feels responsible. You rehearse conversations. You answer questions no one has asked yet. You try to solve a day that has not arrived. But the Lord did not command you to live two days at once.
The KJV wording is direct: take no thought for the morrow. That means tomorrow is not allowed to preach louder than Christ tonight. It may have duties. It may have trouble. It may have decisions waiting. But it does not have the right to steal the rest God gives this evening.
Pray plainly: Lord, I give You tomorrow before I enter it. I confess that I have tried to carry what You have not placed in my hands for tonight. Teach me to obey Matthew 6:34. Give me grace for this hour, wisdom for the next step, and peace while I sleep.
If a specific worry keeps returning, write it down in one sentence. Do not write the whole story. Do not build the whole fear. Just name it, close it, and pray: Lord, tomorrow belongs to You before it belongs to me.
One quiet next step: read Matthew 6:34 once more, breathe slowly, and ask God for enough grace for tonight. Not for every imagined outcome. Not for every possible problem. Enough for tonight.