TL;DR
Almost all overthinking is about a future we cannot control. The mind plays the same scenarios on loop, hoping that one more pass will produce certainty. It never does. There is a simple teaching, expressed in many traditions: do not worry — what is meant for you will reach you, and what isn't, wouldn't have stayed anyway. Whether you frame this as God's plan, the universe, or simply how life works, the practical instruction is the same: stop trying to think your way out of what only time can answer.
Notice what your mind is doing when you overthink.
Almost always, it is replaying a conversation that already happened, or rehearsing a future that hasn't arrived. Very rarely is it solving anything in the present. The same scenarios cycle through, slightly varied each time, and the mind hopes that one more pass will finally produce certainty.
It never does. That is the trap.
Most overthinking is about a future you cannot control
If you look honestly at what fills the loop, most of it falls into one of two categories: what might go wrong tomorrow, or what I should have done yesterday. Both are outside the present moment. Both are outside your control.
The mind has trouble accepting this. It treats unsolved questions as urgent threats and refuses to release them until they're answered. But many questions — will this work out, will I be alone, am I making the right choice — cannot be answered by thinking. They can only be answered by time.
Overthinking is the mind's protest against this fact.
A simple teaching that points the way
There is a line in Sikh scripture, written about five hundred years ago, that addresses this directly:
ਨਾਨਕ ਚਿੰਤਾ ਮਤਿ ਕਰਹੁ ਚਿੰਤਾ ਤਿਸ ਹੀ ਹੇਇ ॥
Nanak chinta mat karahu, chinta tis hi hey
Do not worry. The worry belongs to the One who made you.
— SGGS Ang 955
The verse continues with an observation: even the creatures in the deepest ocean are provided for. Even the smallest insect, far from any human concern, has its sustenance arranged before it arrives in the world. If that is true for them, what makes you think it is not also true for you?
This isn't a uniquely Sikh observation. Almost every contemplative tradition has noticed the same thing: the worrying mind imagines itself responsible for outcomes it does not actually control. Stoic philosophers wrote about it. Buddhist teachers wrote about it. Christian mystics, Sufi poets, Hindu sages — same observation, different vocabularies.
The mind that genuinely accepts this rests. The mind that doesn't accept it spins.
"Every grain has a name on it"
There is an old story in the Sikh tradition that makes this point in a way that's hard to forget.
Guru Nanak Dev Ji and his companion Bhai Mardana were traveling. Guru Nanak said, "Every grain of food bears the name of the one who will eat it."
Mardana doubted. Every grain? Surely that's just a turn of phrase. He took a kernel of maize in his mouth and prepared to chew — proof, he thought, that this grain was destined for him.
At that moment, he sneezed. The kernel flew out of his mouth onto the ground. A nearby hen immediately picked it up and ate it.
"That grain," Guru Nanak said, "had the hen's name on it. Not yours."
You don't have to take the story literally to take its teaching. The point isn't magic — it's that the world has a way of arranging what reaches whom, and our certainty about what is "ours" is often less certain than we think. The maize that you assume is for you may, in the end, belong to the hen. What feels like loss is often just a redirection you couldn't see.
The teaching, applied to overthinking: stop being so sure you know what's supposed to happen. You're not the only one with a name on the grain.
The practical instruction
If you want to overthink less, the work is twofold.
First, notice when it's happening. Most overthinking is so habitual that you're inside the loop before you realize. Just naming it — I'm overthinking this — interrupts it.
Second, ask one question: is this something I can actually do anything about right now? If yes, do it. If no, let it go. Not forever — just for now. The thought will come back. You'll let it go again. And again. Slowly, the grip loosens.
A closing thought
What is supposed to happen will happen anyway. Not because effort doesn't matter — but because the parts of life that overthinking obsesses over are precisely the parts that don't yield to thinking.
Whatever made the universe seems to have already arranged the basics. You are alive. You are reading this. The grain that was meant for you has, somehow, reached you every day so far. There is some logic in assuming it will continue.
Not blind faith. Just enough trust to put the loop down for a moment, and see what the present has actually brought you.