The Vulcans have learned to suppress and control feelings and emotions, and rely on cool intelligence. And this reflects the common view in our culture, at least in the 60s: we either have to act on our feelings and emotions, or we have to suppress them.
Either way, we do battle with them. They are an Other that either controls or is controlled by us. There is a space where I am here and emotions there, and when they get strong, they either flood and overpower me, or I am able to erect and maintain a wall that keeps them in check.
The skill of the Vulcans is to be able to very effectively erect and maintain these walls, although they do break down sometimes (sometimes with scary results, and other times to the glee of Kirk and Bones.)
Trapped in this mode, the sense is that if I allow myself to fully experience something, it will take over, it will overpower me, I will loose control. And this fear is the motivation to keep holding it at bay, whatever it is - grief, sadness, anger, rage, pain, joy, pleasure, love, bliss.
But this is only one option. The other is to allow ourselves to fully experience whatever we experience, to be with it, to allow resistance to the content of our experience to fall away.
Here, there is a sense of spaciousness, of holding and allowing any content. And there is a sense of release, and we realize that the pressure that we thought we were erecting a wall and fighting against, was created by the wall and the fighting itself. Without the wall and the resistance, there is no pressure. There is just whatever is experiences, unfolding within and as awareness and space, and that is it.
There is no sense of being overpowered, because the whole sense of I and Other becomes more transparent and spacious. They are revealed as part of the same space.
Intense experiences may be unfolding, but unfolding within a much larger (actually infinite) space. There is only pressure when the space is walled in. Without walls, no pressure.
And without pressure, any experience is revealed as bliss itself. For me right now, giving a sense of blissful smooth expansive quiet fullness,.