You must remain vigilant always. For when the condition is good, the lower movements have a habit of subsiding and become quiescent, hiding as it were, — or they go out of the nature and remain at a distance. But if they see that the sadhak is losing vigilance, then they slowly begin to rise or draw near, most often unseen, and when he is quite off his guard, surge up suddenly or make a sudden irruption. This continues until the whole nature, mental, vital, physical down to the very subconscient is enlightened, conscious, full of the Divine. Till that happens, one must always remain watchful in a sleepless vigilance.
There is another thing which you must learn. If you are interrupted in sadhana. . . you must simply remain inwardly quiet and allow the interruption to pass. If you learn to do this, the inner state of experience will go on afterwards just as if nothing had happened. If you attach undue importance and get upset, on the contrary, you change the interruption into a disturbance and the inner state or experience ceases. Always keep the inner quiet and confidence in every circumstance; allow nothing to disturb it or to excite you. A steady inner calm and quiet will and psychic faith and bhakti are the one true foundation for your sadhana.
Our life was born in pain and with a cry.
Although earth-nature welcomes heaven's breath
Inspiring Matter with the will to live,
A thousand ills assail the mortal's hours
And wear away the natural joy of life.