Muṇḍaka Upaniṣad · 2.1.6

तस्मादृचः साम यजूꣳषि दीक्षा यज्ञाश्च सर्वे क्रतवो दक्षिणाश्च । संवत्सरश्च यजमानश्च लोकाः सोमो यत्र पवते यत्र सूर्यः

tasmād ṛcaḥ sāma yajūṃṣi dīkṣā yajñāś ca sarve kratavo dakṣiṇāś ca | saṃvatsaraś ca yajamānaś ca lokāḥ somo yatra pavate yatra sūryaḥ

From him arise the Ṛg hymns, the Sāma chants, the Yajur formulas; the ritual consecration, all sacrifices, the rites, the donations; the year, the sacrificer, the worlds where Soma flows and where the sun shines.

The entire ritualistic universe —the Vedas themselves— emerge from the Person.

Ṛcaḥ sāma yajūṃṣi — the three main Vedas. The sacred word, the ritual music, the prose formulas.

Dīkṣā — the consecration, initiation. The process that transforms the sacrificer.

Yajñāḥ… kratavaḥ — sacrifices and specific rites. The entire infrastructure of Vedic worship.

Dakṣiṇāḥ — the donations, fees. The reciprocity that sustains the ritual system.

Saṃvatsaraḥ — the year. The temporal cycle that governs the rituals.

Yajamānaḥ ca lokāḥ — the sacrificer and the worlds. The agent and the results of ritual action.

Somaḥ… sūryaḥ — where Soma flows and the sun shines. The higher worlds accessible through ritual.

Even the means of worship are projections of the worshipped.