Chandogya Upanishad
Prapathaka VI, Khanda 14
'As one might lead a person with his eyes covered away from the Gandhâras , and leave him then in a place where there are no human beings; and as that person would turn towards the east, or the north, or the west, and shout, "I have been brought here with my eyes covered, I have been left here with my eyes covered,"
'And as thereupon some one might loose his bandage and say to him, "Go in that direction, it is Gandhâra, go in that direction;" and as thereupon, having been informed and being able to judge for himself, he would by asking his way from village to village arrive at last at Gandhâra,--in exactly the same manner does a man, who meets with a teacher to inform him, obtain the true knowledge . For him there is only delay so long as he is not delivered (from the body); then he will be perfect .