It is not possible to vibrate even 2 times the speed of light, if you manage to actually vibrate it at the speed of light, which is hard and you need to work to that point, is enough and the goal. To vibrate something at that not even imaginable speed is delusional and not intune of how much the effects of spiritual workings have effect in reality/physical. Can't imagine it otherwise. When you command the vibration, it automatically tunes at the most potential it can be manifested, and in time it expands more and more, but not exceeding its nature of frequency.
If I'm not mistaken that Hp was not of his claimed advancements, read something about the kundalini which didn't ring a bell about the reality of the experiences and as so I haven't bothered to read from him anymore. Him or another one I guess.
The fact is, the way you feel your own soul and the nature of experiences are so natural and most of times new, sometimes scary and painful that they cannot be ever translated by words, understood by another one. If you are blind from birth and I describe you a color you won't have the reality of it in your mind, and so every part of the soul is felt and works in a way that it is very real and clear to your own being. Suppositions or projections of the mind on top of real perception of it gets you to delusions and lies to yourself. Also most of things are very complex and with complex connections and consequences, it is not wise to suppose like an experiment. For example you do not do surgery on suppositions.
The evil eye if you have ever witnessed any real occurence or experienced one, most of the time and a usual one is a small and low form of magic. Imagine the body having the energy flowing in paths and directions exactly like blood flows in veins and arteries, lowest form of 'evil' eye is changing the directions of the energy, making conflicts and disharmony in the way the body functions. This can be done by projecting a little condesed energy to the other one in different parts of the body. The higher form is deadly and can be sent and activated at any time as the magician pleases.