Shree LakshmiNrsmha cite...

I liked the following cite very much, from the Foreword to the Sanskrit-Hindi Edition of "Shree Sharada-Tilakam":

Yantra Nirmana Guru...

Another great cite from the Foreword to the Sanskrit-Hindi Edition of "Shree Sharada-Tilakam".

For those who don't know Hindi the gist in brief: Tantra Sadhana is primarily based on Yantras, so the Guru who perfectly knows the art of Yantras' construction is truly crucial:

Advice regarding Tamasika Mantras (मारण, मोहन, उच्चाटन Mantras)...

The Foreword to the Sanskrit-Hindi Edition of "Shree Sharada-Tilakam" includes very reasonable advice regarding Tamasika Mantras: