Dear instructors, are there prerequisites other than good concentration to consciously travel within the astral body? I am curious if a certain level of development in the work is needed and my attempts are futile until such development is attained. In particular, I work with FA RA ON nightly, and can see that I must improve concentration and visualization further, but again I am wondering if factors such as karma or how active certains chakras are also prevent the conscious utilization of the astral body. I remember many years ago I was more capable of such experiences whereas now I am struggling.

Many thanks.