its probably the same concept as needing food energy to digest food and gain more energy.
if your tired or malnourished then meditation will make you tired, like last night I fell asleep doing hatha yoga.
I was close to building an energy buzz but I was tired.
it takes energy to build energy but this is how power meditation compounds upon itself, the more power you have the more power you can generate.
also you are probably breathing out the energy with your vibrations when you should be directing your vibrations on and in your chakras. its easy to mess this up,especially if youre tying to breath the vibration into your chakra.
just because your tired doesn't mean you didn't raise soul energy,it just means you used physical energy
doing the full chakra meditation helped me to be able to see/feel my chakras inside me,aswell as to see and feel the energy that it makes, even though a 2 hour "FULL" chakra meditation makes you tired by the end of it, you feel the power inside you and that's all the difference.
as long as you can individually feel the chakras your vibrating into for the 666 meditation, then you are going to generate power regardless of whether you feel it or not.
if you don't want to get tired then do breathing exercises instead of vibrations
https://docs.google.com/document/d/1yoE ... 944nE/edit