Gopi Krishna was a scientifically well informed man who wrote a detailed account of his life story and dramatic kundalini awakening which first occurred in 1937 and stabilized roughly 12 years later into a full state of perennial enlightenment in around 1949.
His autobiography is known under the title " Kundalini: The Evolutionary Energy in Man "
Excerpts From his autobiography
"... He started on a discipline of meditation to discover who he was. After having been engaged in this for many years, he had his first Kundalini experience at the age of 34, which he describes thus in his autobiography:
"... Suddenly, with a roar like that of a waterfall, I felt a stream of liquid light entering my brain through the spinal cord.
Entirely unprepared for such a development, I was completely taken by surprise; but regaining my self-control, keeping my mind on the point of concentration. The illumination grew brighter and brighter, the roaring louder, I experienced a rocking sensation and then felt myself slipping out of my body, entirely enveloped in a halo of light. It is impossible to describe the experience accurately. I felt the point of consciousness that was myself growing wider surrounded by waves of light.
It grew wider and wider, spreading outward while the body, normally the immediate object of its perception, appeared to have receded into the distance until I became entirely unconscious of it. I was now all consciousness without any outline, without any idea of corporeal appendage, without any feeling or sensation coming from the senses, immersed in a sea of light simultaneously conscious and aware at every point, spread out, as it were, in all directions without any barrier or material obstruction.
I was no longer myself, or to be more accurate, no longer as I knew myself to be, a small point of awareness confined to a body, but instead was a vast circle of consciousness in which the body was but a point, bathed in light and in a state of exultation and happiness impossible to describe..."