I believe it is important to go deep quickly when feeling into the subtlety of sensations, of the life force in the body. Otherwise, it is too easy get distracted by the mind chatter that keeps you stuck in endless loops of superficial thoughts, memories, desires, etc.
When feeling “below the surface” of familiar sensations, the focus of mind is turned inwardly to vibrations that at first may not be familiar. In order to “hold” or focus upon these subtle sensations, it requires a more delicate “touch”or tuning in.
This is not difficult to do, it just requires a different relationship with sensations, with the Life Force. We all have the sensitivity to connect with finer and finer vibrations/sensations. It’s just a matter of making up the mind to feel below the surface of superficial sensations…and then to continue going deeper and deeper.
No matter where you are in this process, start wherever you are in the moment. If you are sad, feel the sensation of sadness and then feel slightly below the surface…and then go slightly deeper, etc.
The benefit of going deep quickly, no matter where you are in the process, is that you want to break yourself out of the familiar patterns of remaining on the surface of feelings.
Going deep quickly is a way to disrupt the habitual patterns that keep the mind locked in superficial thinking and feeling.