Subtlety is the quality of being delicate, not obvious, or full of small details that require careful attention to notice or understand.
From Old French 'sotelte', from Latin 'subtilitas' meaning 'fineness, delicacy', from 'subtilis' (fine, thin). It originally described fine craftsmanship and clever thinking.
Subtlety is what separates a clever joke from a loud one and a deep story from a simple plot. The more you train your brain to notice subtlety, the more layers you start seeing in people, art, and even arguments.
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