It is the animating principle of all creatures, it is the eternal Purusha. It is great, it is the intelligence and it is the Ego, it is the seat of all elements.
स जन्तुः सर्वभूतात्मा पुरुषः स सनातनः। महान् बुद्धिरहङ्कारो भूतानां विषयश्च सः॥