Worst thing for Sadhana

The worst thing for sadhana is to get into a morbid condition, always thinking of “lower forces, attacks.” If the sadhana has stopped for a time, then let it stop, remain quiet, do ordinary things, rest when rest is needed—wait till the physical consciousness is ready. My own sadhana when it was far more advanced than yours used to stop for half a year together. I did not make a fuss about it, but remained quiet till the empty or dull period was over.

Ref : Letters on Yoga Vol. III