Knowledge - The "Double" edged sword

Nithyananda compares knowledge to a knife - that can get dangerous in the hand of a terrorist or it can heal in the hands of a doctor. Given this, what is the secret behing Shiva Sutra where Shiva opens all techniques to everybody without any prerequisites? The people who listen to the Sutras understand this from their level of the consciousness. As their conscious grows new meanings emerge from the Sutras thereby eliminating the danger of this knowledge being misused by anybody.