By authorized Vedic knowledge one can see that the forms of cause and effect in the cosmic manifestation belong to the Supreme Personality of Godhead, for the cosmic manifestation is His energy. Both cause and effect are nothing but energies of the Lord. Therefore, O my Lord, just as a wise man, by considering cause and effect, can see how fire pervades wood, those engaged in devotional service understand how You are both the cause and effect.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
रूपे इमे सदसती तव वेदसृष्टे बीजाङ्कुराविव न चान्यदरूपकस्य । युक्ताः समक्षमुभयत्र विचिन्वते त्वां योगेन वह्निमिव दारुषु नान्यतः स्यात्
rūpe ime sadasatī tava vedasṛṣṭe bījāṅkurāviva na cānyadarūpakasya | yuktāḥ samakṣamubhayatra vicinvate tvāṃ yogena vahnimiva dāruṣu nānyataḥ syāt
SB 7.9.47