2
Śrīmad-Bhāgavatam
[Canto 8, Ch. 17]
śrī-śuka uvāca 
  ity uktā sāditī rājan 
  sva-bhartrā kaśyapena vai 
  anv atiṣṭhad vratam idam 
  dvādaśāham atandritā
śrī-śukaḥ uvāca—Śrī Śukadeva Gosvāmī said;  iti —thus;  uktā —being advised;  sā —that lady;  aditiḥ —Aditi;  rājan —O King;  sva-bhartrā —by her husband;  kaśyapena —Kaśyapa Muni;  vai —indeed;  anu —similarly;  atiṣṭhat —executed;  vratam idam —this  payo-vrata  ritualistic ceremony;  dvādaśa-aham —for twelve days;  atandritā —without any laziness.
TRANSLATION
Śukadeva Gosvāmī said: O King, after Aditi was thus advised by her husband, Kaśyapa Muni, she strictly followed his instructions without laziness and in this way performed the  payo-vrata  ritualistic ceremony.
PURPORT
For advancement in anything, especially in spiritual life, one must strictly follow the bona fide instructions of the teacher. Aditi did this. She strictly followed the instructions of her husband and  guru . As confirmed in the Vedic injunctions,  yasya deve parā bhaktir yathā deve tathā gurau . One should have complete faith in the  guru , who helps the disciple make progress in spiritual life. As soon as the disciple thinks independently, not caring for the instructions of the spiritual master, he is a failure ( yasyāprasādān na gatiḥ kuto 'pi ). Aditi very strictly followed the instructions of her husband and spiritual master, and thus she was successful.
TEXTS 2-3
चिन्तयन्त्येकया बुद्ध्या महापुरुषमीश्वरम् । 
  प्रगृह्येन्द्रियदुष्टाश्वान्मनसा बुद्धिसारथिः ॥ २ ॥ 
  मनश्चैकाग्रया बुद्ध्या भगवत्यखिलात्मनि । 
  वासुदेवे समाधाय चचार ह पयोव्रतम् ॥ ३ ॥