By the parampara system, one who has got the knowledge, he's a spiritual master, and the proof is - how one is spiritual master - that means parampara, as Krsna says. He does not change the words of Krsna, but he follows the words of Krsna: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.