CC Ādi 5.38

nirviśeṣa-brahma sei kevala jyotir-maya
sāyujyera adhikārī tāṅhā pāya laya
Synonyms: 
nirviśeṣa-brahma — the impersonal Brahman effulgence; sei — that; kevala — only; jyotiḥ-maya — effulgent rays; sāyujyera — the liberation called sāyujya (oneness with the Supreme); adhikārī — one who is fit for; tāṅhā — there (in the impersonal Brahman effulgence); pāya — gets; laya — merging.
Translation: 
That impersonal Brahman effulgence consists only of the effulgent rays of the Lord. Those fit for sāyujya liberation merge into that effulgence.