Caitanya-caritāmṛta 9.255
sādhya-sādhana āmi nā jāni bhāla-mate sādhya-sādhana-śreṣṭha jānāha āmāte
[saadhya-saadhana aami naa jaani bhaala-mate saadhya-saadhana-shreshtha jaanaaha aamaate]
Blended reading (Sanskrit + English inline)
sādhya-sādhana āmi nā jāni bhāla-mate sādhya-sādhana-śreṣṭha jānāha āmāte
Caitanya Mahāprabhu said, “I do not know very well the aim of life and how to achieve it. Please tell Me of the best ideal for humanity and how to attain it.”
My note
Source: vedabase.io