CC Ādi 2.53
ঈশস্য যত্রিভির্হীনং তুরীয়ং তৎ প্রচক্ষতে ॥ ৫৩ ॥
kāraṇaṁ cety upādhayaḥ
īśasya yat tribhir hīnaṁ
turīyaṁ tat pracakṣate
virāṭ — the virāṭ manifestation; hiraṇya-garbhaḥ — the hiraṇyagarbha manifestation; ca — and; kāraṇam — the kāraṇa manifestation; ca — and; iti — thus; upādhayaḥ — particular designations; īśasya — of the Lord; yat — that which; tribhiḥ — these three; hīnam — without; turīyam — the fourth; tat — that; pracakṣate — is considered.
“ ‘In the material world the Lord is designated as virāṭ, hiraṇyagarbha and kāraṇa. But beyond these three designations, the Lord is ultimately in the fourth dimension.’
Virāṭ (the phenomenal manifestation of the Supreme Whole), hiraṇyagarbha (the numinous soul of everything), and kāraṇa (the cause, or causal nature) are all but designations of the puruṣas, who are responsible for material creation. The transcendental position surpasses these designations and is therefore called the position of the fourth dimension. This is a quotation from Śrīdhara Svāmī’s commentary on the Eleventh Canto, fifteenth chapter, verse 16, of Śrīmad-Bhāgavatam.