Mastery of thought

[Gladius]

How does one understands they attained the mastery of thought siddhi?

 

[Zirgohed]

It is sustained void meditation/trance, done at will. Ability to not think at all.

 

[Heron]

How does one understands they attained the mastery of thought siddhi?

When you have mastered thought control, your mind must be completely free of any intrusive thoughts. When you focus on something, you are able to hold it steady without any negative influence or conflicting thought pulling you away. Once mastered, you will know it yourself. You will recognize that state because time no longer feels real, you live fully in the present, and you become one with your thought.