Light Definition
مقدّمة الرأس، شعر الجبهةThe forelock; the front of the head
Al-Raghib — Arabic
[نصي]
النَّاصِيَةُ: مقدّمة الرأس وشعرها. قال تعالى: لَنَسْفَعاً بِالنَّاصِيَةِ. ناصِيَةٍ كاذِبَةٍ خاطِئَةٍ [العلق/ ١٥-١٦]. والسَّفْعُ: الأخذ بعنف وجذب بشدّة. ووصف الناصية بالكذب والخطيئة لأنّ صاحبها كاذب خاطئ، فنُسب الفعل إلى الجزء تعبيرًا عن الذّل.
Al-Raghib — English
[Root: n-s-y]
Al-nasiyah is the front of the head and its hair (the forelock). Allah says: "We will surely drag him by the nasiyah (forelock), a lying, wrongful nasiyah" [Al-\'Alaq/15-16]. Al-saf\' means to seize violently and drag forcefully. The forelock is described as lying and sinful because its owner is a liar and sinner; the act is attributed to the body part to express ultimate humiliation.
📝Modern neuroscience has confirmed that the prefrontal cortex (behind the forehead/nasiyah) is the brain region responsible for decision-making, planning, and lying. The Qur\'an attributed lying to the forelock 1400 years before this discovery.