श्रीमदानन्दतीर्थार्यमुखनिःसृतम्

shrImadAnandatIrthArya mukha nihsR^itaM

महद्भ्यो विष्णुभक्तेभ्यो यथाशक्ति च संशयान् छिन्द्यात् ।। 

mahadbhyo viShNubhaktebhyo yathAshakti ca saMshayAn.h ChindyAt.h ।

Purport:

One should listen to the scriptures from a knowledgeable person, who is also a devotee of Vishnu, and clear one's doubts, ignorance and mistakes. Listening to the scriptures will be fruitful only when done with reverence. Only a devotee of Vishnu will be able to teach in an appealing way so as to generate a feeling of reverence towards the subject matter. So, one should learn from a person who is an ardent devotee of Vishnu. If it is not possible to listen to the entire scriptures from a single person, one can learn small portions from other qualified persons and clear one's doubts.