"Dattatreya is the universal Guru, isn’t he? And he has said that the
whole world was his Guru. If you look at evil you feel you should not
do it. So he said evil also was his Guru. If you see good, you would
wish to do it; so he said that good also was his Guru; both good and
evil, he said, were his Gurus. It seems that he asked a hunter which way
he should go, but the latter ignored his question, as he was intent
upon his aim to shoot a bird above. Dattatreya saluted him, saying,
‘You are my Guru! Though killing the bird is bad, keeping your aim so
steadfast in shooting the arrow as to ignore my query is good, thereby
teaching me that I should keep my mind steadfast and fixed on Ishwara.
You are therefore my Guru.’ In the same way he looked upon everything as
his Guru, till in the end he said that his physical body itself was a
Guru, as its consciousness does not exist during sleep and the body that
does not exist should therefore not be confused with the soul —
dehatmabhavana (the feeling that the body is the soul). Therefore that
too was a Guru for him. While he looked upon the whole world as his
Guru, the whole world worshipped him as its Guru."
(Bhagavan in 'Letters from Sri Ramanasramam' 99)