Hard work and attention given to a task over a long period; dedication and careful effort.
From Latin 'assiduitas' (from 'assidere' meaning 'to sit by,' from ad- 'to' + sedere 'to sit'). The metaphor of 'sitting by' your work suggests constant, devoted presence and attention.
The Romans literally imagined diligent people as those who would 'sit by' their work—they understood that real achievement comes from just showing up repeatedly, which is why modern psychology confirms that consistency matters more than raw talent!
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