Not just in the astral plane, also mental, causal, vital planes …
LIGHT: lucidity, clarity of vision in meditation, happiness, joy, peace, a goal in mind, confidence, hope, willpower, high energy, strength, motivation
DARKNESS: no internal vision, distress, despair, tremendous sadness, depression, hopelessness, no will, no energy, no aim, no sense in life, mental power feels robbed, empty feeling, fear, giving up, wishing to die
Clearly such a fall into darkness has a reason and cause. I am not asking why it happens. I want to know how it is possible at all that our internal light be extinguished by darkness.