Om Sathguru Sri Seshadri Swamigal Thiruvadikkae
Disciple:
Does the illumination of the Sahasrara entail the automatic attainment of Samadhi?
Master:
The divine light in the Sahasrara is as brilliant as a thousand suns, but it is not hot. Through sustained contemplation of that divine light, the mind becomes totally still.
Then the mind relinquishes thought and the individual consciousness ceases. That state is also called Samadhi, total stillness.
Miracles of Avathars 