Vidhi means Brahmā, the first created living being. He is the original student as well as professor of the Vedas. He learned it from Śrī Kṛṣṇa and taught Nārada first. So Nārada is the second ācārya in the line of spiritual disciplic succession. He is the representative of Brahmā, and therefore he is respected exactly like Brahmā, the father of all vidhis