1Think of the reaction as a small program sitting quietly, waiting for one particular condition. It is not running all the time, and which condition wakes it is a question with an answer.
Keep a short list for a few weeks. Only what was happening in the ten seconds before: a tone of voice, being interrupted, somebody standing over you while you sit, being asked where you have been. Patterns turn up faster than most people expect, and a trigger you can name is already half handled.
Islamic evidence
Have they not thought about their own selves (Quran 30:8). Turning attention inward is set as the work, not offered as an optional extra.
“Have they not thought about their own selves? God did not create the heavens and earth and everything between them without a serious purpose and an appointed time, yet many people deny that they will meet their Lord”
Qur'an 30:8
Psychological evidence
In a treatment study across mixed anxiety and depressive diagnoses, difficulty tolerating uncertainty was elevated at the start, fell during treatment, and its reduction was associated with better outcomes. Not knowing when the thing will fire is part of what makes it heavy, and that part does seem to move. This was a secondary analysis, so the link between the two changes is an association rather than a demonstrated cause.
James F. Boswell; Johanna Thompson‐Hollands; Todd J. Farchione; David H. Barlow (2013). Journal of Clinical Psychology · doi
Review detail
Why it works. A trigger you can see coming stops being a surprise, and the surprise is where most of its power lives.