120. Bhaktivaśyā

Devi comes to the aid of the devotee if there is real devotion. The ‘vaśya’ means 'controlled'. Even the Supreme Empress can be controlled through devotion and diligence. Since Devi manifests Herself as the entire cosmos, this implies the control of the yogi over the cosmic forces. These are called the siddhis. One of the siddhis, which keeps manifestation in the early stages of sādhana, is a vākśuddhi, sometimes called vāksiddhi. This means that what one says becomes true. This being so, the devotees are cautioned to refrain thinking evil thoughts. Through love and affection anyone can be controlled. Sometimes control can be exercised through fear. But such control creates more than it solves.

When a devotee starts using the siddhis for selfish or egoistic purposes, namely such purposes which are for the benefit of oneself and not truly meant for the benefit of the person whom he is trying to control, then the siddhis start disappearing, consuming the tapas done by the devoted sādhaka. On the contrary, siddhis used for the real benefit of the person being controlled, enhance the siddhis. It is obvious that it is not always true that the use of the powers given to the devotee results in a loss of tapas. The purpose is important. There are enough evil people or evil thoughts in the world. It is not necessary, nor even advisable to shun the acquisition of siddhis when they naturally come, provided the person acquiring the siddhis acts for the good of everyone. Sometimes what may appear to be doing good for one person or a set of people may not be so. It is necessary that the good forces must be made stronger in this world to achieve peace and stability and to contain the evil forces to a tolerable level.

Source: Śrī Amṛtānandanātha Sarasvatī "Sudhā Syandinī Bhāṣyaṃ" Typed Manuscript 
(an incomplete commentary on Lalitā Sahasranāma)