I always wondered why there is a tolerance level mentioned +/- some percentage for the electronic components or some others things in life. It is now that understood it’s the most important thing for a component or a thing or a human emotion or patience.
In Bhagavad Geetha the preacher said that duḥkheṣhv-anudvigna-manāḥ sukheṣhu vigata-spṛihaḥ
vīta-rāga-bhaya-krodhaḥ sthita-dhīr munir uchyate
