When feeling into the overall sensation of the body, notice the corresponding shifts in awareness, however subtle. For example, when sitting (as in meditation pose), while experiencing the overall vibration/sensation of the body, it is important to also notice the very slight shifts in consciousness as the mind begins to tune into the finer movements of energy deep within the body.
By noticing the very slight shifts in consciousness, as the awareness latches onto finer and finer currents of sensations, it gives a reference point for knowing how to go deeper and deeper into the subtle reverberations of the life force.
This “reference point” of the simple “noticing/acknowledging” of feeling into what is just beneath any sensation (giddiness for example) provides an entry point for the mind to go deeper into subtle vibration. Any sensation, then, can serve as an invitation for the mind to follow and grab hold of the finer and finer threads of vibrations that then lead to deeper and deeper states of meditative trance.