By training in the three training of the path [renunciation, right view, bodhicitta ], one is protected from the conception of a self. By training in the mind of enlightenment [bodhicitta] together with the conduct [six perfections], one is protected from the obstructions to knowledge. By training in the two stages [tantric generation and completion stages] of path, one is protected from the most subtle obstructions to knowledge that cannot be abandoned by the sutra path.
Nectar from the Mouth of Akshobhya, Aku Sherap Gyatso
bracketed comments by Tendrol