Karika 36

एते प्रदीपकल्पाः परस्परविलक्षणा गुणविशेषाः। कृत्स्नं पुरुषस्यार्थं प्रकाश्य बुद्धौ प्रयच्छन्ति ॥३६॥

These (instruments) having various special and opposing qualities tries to illuminate the intellect, like a lamp, for the sake of the purusha.