Śrī Caitanya Caritamrta · Text Ādi 8.17
জ্ঞানতঃ সুলভা মুক্তির্ভুক্তির্যজ্ঞাদিপুণ্যতঃ ।
সেয়ং সাধনসাহস্রৈর্হরিভক্তিঃ সুদুলর্ভা ॥ ১৭ ॥
jñānataḥ su-labhā muktir
bhuktir yajñādi-puṇyataḥ
seyaṁ sādhana-sāhasrair
hari-bhaktiḥ su-durlabhā
“By cultivating philosophical knowledge one can understand his spiritual position and thus be liberated, and by performing sacrifices and pious activities one can achieve sense gratification in a higher planetary system, but the devotional service of the Lord is so rare that even by executing hundreds and thousands of such sacrifices one cannot obtain it.”
Read Śrīla Prabhupāda's purport on Vedabase.io