Your mind is made of cosmic Consciousness but mixed with your individual prana. Which means your mind accesses only a limited part of Consciousness, only as much as your prana allows.  And that means when you’re low on prana, your mind is dying on the vine.  So, your mind brings up all the threatening things that could happen, or have happened, giving you thoughts that match… 

—  Gurudevi  Nirmalananda

From Gurudevi’s full discourse “Prana – Life Energy“