तत्रापरा ऋग्वेदो यजुर्वेदः सामवेदोऽथर्ववेदः शिक्षा कल्पो व्याकरणं निरुक्तं छन्दो ज्योतिषमिति ।अथ परा यया तदक्षरमधिगम्यते ॥ ५ ॥
Śaunaka asks for the one thing whose knowing is the knowing of everything, and is answered with a distinction between two kinds of knowledge.The lower is drawn as a list because it is one and can be completed; the higher cannot be enumerated and is drawn as a single centre. The asymmetry between the two sides is the mantra's point, not a shortage of items.
In plain words
Aparā Vidyā comprises the Ṛgveda, Yajurveda, Sāmaveda, Atharvaveda, and the six Vedāṅgas: Śikṣā—phonetics; Kalpa—ritual procedure; Vyākaraṇa—grammar; Nirukta—etymology; Chandas—metre; and Jyotiṣa—astral reckoning. Parā Vidyā is that by which Akṣara, the Imperishable, is realized.