It is a qualification of a Vaiṣṇava that he is adoṣa-darśī: he never sees others’ faults. Of course, every human being has both good qualities and faults. Therefore it is said, saj-janā guṇam icchanti doṣam icchanti pāmarāḥ: everyone has a combination of faults and glories. But a Vaiṣṇava, a sober man, accepts only a man’s glories and not his faults, for flies seek sores whereas honeybees seek honey. Haridāsa Paṇḍita never found fault with a Vaiṣṇava but considered only his good qualities.
Ref >> Srila Prabhupada Vani.