Nothing of a Muslim is wasted
مَا يُصِيبُ الْمُسْلِمَ مِنْ نَصَبٍ وَلَا وَصَبٍ وَلَا هَمٍّ وَلَا حُزْنٍ وَلَا أَذًى وَلَا غَمٍّ، حَتَّى الشَّوْكَةُ يُشَاكُهَا، إِلَّا كَفَّرَ اللَّهُ بِهَا مِنْ خَطَايَاهُ
Ma yusibu-l-muslima min nasabin wa la wasabin wa la hammin wa la huznin wa la adhan wa la ghammin, hatta-sh-shawkatu yushakuha, illa kaffara-llahu biha min khatayah.
"No fatigue, illness, anxiety, grief, harm, or distress afflicts a Muslim, even a thorn that pricks him, except that Allah expiates by it some of his sins."
Narrated by Abu Sa'id al-Khudri and Abu Hurayrah. Sahih al-Bukhari 5641, Sahih Muslim 2573
A short reflection
Every minor irritation is accounting for something larger. The thorn that pricks. The headache. The traffic. None of it is wasted.