It is clearly stated in the tantric texts that beginners should not do what the yogis do, that yogis not act like realized masters, and realized masters not behave like the Buddha. Beginners aiming to make progress should start by undertaking seriously the practices of contemplating the rare and precious human birth, impermanence of all phenomena, suffering of samsara, etc., and adhering to the precepts rigorously.

- Quote from Gateway to the Vajrayana Path, "The Parable of a Black Snake"