There is a specific moment that every juggler knows but almost never talks about.
It is the moment just before the first throw of a session - before the pattern is running, before the muscle memory has engaged, before you have confirmed that today is still a day when you can do this.
In that moment, there is a question. Not a verbal question. A physical one. The hands are holding the balls, the weight is familiar, the arc is mapped somewhere in the motor system - but the confirmation is not yet in. You are on the threshold.
The throw either works or it doesn’t. You don’t know yet.
What the threshold contains
Most decisions are not made in the moment of action. They are made in the moment just before it.
The choice to start the cascade is made in the pause before the first throw. The choice to add the fourth ball is made in the instant before the hands diverge from the three-ball pattern. The choice to show a skill to an audience is made in the breath before the performance begins.
All of these thresholds have the same structure: you are holding what you have, you can see what you are reaching toward, and the gap between them is real.
The gap is not ignorance. You know, approximately, what is going to happen. If you have practised, the motor system has a strong expectation of the outcome. But the expectation is not certainty, and in the interval between intention and execution, that distinction is felt acutely.
Why this is useful to understand
Understanding the threshold moment is useful for two reasons.
Second, it explains why repetition changes the threshold experience over time. The first time you throw three balls into a cascade, the threshold contains genuine uncertainty - you don’t know if you can do it, because you haven’t yet. After ten thousand repetitions, the threshold contains almost none. The motor system has a very strong prior. The moment before the throw is still present, but it is very brief and the question it holds is almost rhetorical.
Practising the skill is practising the threshold. Getting comfortable with difficult actions requires going to the threshold enough times that the feeling of standing there becomes familiar rather than alarming.
The hands and the stars
The image for this post is hands raised upward against a sky full of stars, holding a single ball.
The hands are about to release it. The moment is the one just before the release - the threshold.
You can be aware of the context without being paralysed by it. The ball is in your hands. The question is specific. You can answer it with a throw.
The stars matter in this image. They represent the enormous scale of what is beyond the moment of action. Whatever you are about to throw into - a performance, a conversation, a decision, a new skill - is larger than the moment of throwing. The stars are the context. The hands are the specific.
Before every difficult thing
This is not only about juggling.
Every time you begin a difficult conversation, make a significant decision, try something you have not succeeded at before - you are at the threshold. The moment before the throw.
The ball is in your hands. The arc is mapped. The outcome is not yet confirmed.
The threshold can be held for a long time or a short time, but it cannot be resolved except by the throw. The analysis, the preparation, the doubt, the revision of the plan - all of it is pre-throw. The only thing that settles the question is the action.
The hands are raised. The stars are there. Throw the ball.
Read next: Two Hands Have to Let Go at Once - what happens when the release is shared between two people.