1Your worth is not your output. A bad day at work does not lower your value as a person.
You are not a scoreboard. Performance rises and falls; your worth is not pinned to it.
Where it sits. Self-worth; contingencies of self-worth
Islamic evidence
We have honoured the children of Adam (Quran 17:70). Your honour is granted, not earned by output; it does not rise and fall with a day.
“We have honoured the children of Adam and carried them by land and sea; We have provided good sustenance for them and favoured them specially above many of those We have created”
Qur'an 17:70
Psychological evidence
Staking your self-worth on external results, work, looks, approval, leaves it fragile and prone to collapse; a steadier self-worth is less contingent on any single outcome.
Crocker, J. and Wolfe, C. T. (2001). Psychological Review · doi
Basing self-worth on external contingencies makes it fragile; less contingent self-worth is more stable and healthy.
Review detail
Why it works. Detaching self-worth from performance protects you from the crashes that come when performance dips.