Caitanya-caritāmṛta, Ādi 12.10, purport

আচার্যের মত যেই, সেই মত সার ।
তাঁর আজ্ঞা লঙ্ঘি’ চলে, সেই ত’ অসার ॥ ১০ ॥

ācāryera mata yei, sei mata sāra
tāṅra ājñā laṅghi’ cale, sei ta’ asāra

Synonyms

ācāryera — of the spiritual master (Advaita Prabhu); mata — opinion; yei — what is; sei — that; mata — opinion; sāra — active principle; tāṅra — his; ājñā — order; laṅghi’ — transgressing; cale — becomes; sei — that; ta’ — however; asāra — useless.

Translation

The order of the spiritual master is the active principle in spiritual life. Anyone who disobeys the order of the spiritual master immediately becomes useless.

Purport

Here is the opinion of Śrīla Kṛṣṇadāsa Kavirāja Gosvāmī. Persons who strictly follow the orders of the spiritual master are useful in executing the will of the Supreme, whereas persons who deviate from the strict order of the spiritual master are useless.