What even is your capacity bucket of proportionate changes?
As is our confidence, so is our capacity. – William Hazlitt
Basically it is both the mental / psychological and physical changes, pressure and intensity, in which you can handle, without spilling over your bucket. Think of it like this; you have a bucket full of water balancing on top of your head and depending on your day and what you experience, this bucket will walk with you, run with your do whatever it is you are doing. But the real trick is to manage this bucket while you do what you do and still allow it to NOT spill over. If it does, well there will be some uncomfortable moments, but there will also be some times where nothing really changes. The point is, whatever the outcome, the best thing you can do is pick it up and keep on keeping on.
The best part is, that next time this occurs you will have hopefully learned the mistakes from the first time, and this should technically deepen your bucket capacity. So if you continue to do this each day and everyday for the rest of your life, imagine by the time you settle down to retire. Imagine the wisdom, the experience and shear breadth of knowledge you should have accumulated. Most of all, imagine how deep and wide and strong and worthy your capacity bucket would be.