Being there

Being is time and time is finite - so far so good. 

To understand what it means to be an authentic human being it is essential that we constantly project our lives onto the horizon of ultimately not-being - what Martin Heidegger called "being-towards-death".

The self can only become what it truly is through the confrontation with not-being.
Literally,  by making  meaning out of  finiteness.

If our being is finite, then what it means to be human consists in grasping finiteness, in "becoming who one is - now- until one, isnt".

We can then find it possible to grasp the paradox of living in relationship with other humans while facing the fact that one has to be ultimately alone with oneself

Heidegger intended the concept of Dasein to provide a stepping stone in the questioning of what it means to be – to have one's own being, one's own death, one's own truth.
Dasein, one's individuality, one's own limited life-span, one's own being.

Da sein (Heidegger)
Lit: There. Being
Or more simply: Being - There

That which is "you", in and of oneself without external reference or projection onto or into any other  signifiers  -  language, everyday curiosity, common beliefs or sense of one's material nature.

One's primal nature begins with self-awareness and ends with the snuffing out of self-awareness.
All this is not to be confused with "Mindfulness" -   a state of being greatly preoccupied with a supra-awareness of externality.

The leap of faith into pure existence requires transcending the world of things. 

The key to really being is a profound faith and trust that the world and one's very existence will not terminate at any point beyond the material. That is not necessarily "heaven", but it might feel like it.

Transcendence and immateriality are essential to the sense of truly "being here, and being there".

The ultimate goal of meditation is to grasp the notion of TS Eliot's in The Wasteland - where he writes
"We had the experience but missed the meaning. And approach to the meaning restores the experience in a different form.'

Existential anxiety is having the experience but missing the meaning and the tendency for the mind to lose sight of pure existence - we need to approach the meaning and discover that this is indeed enough "to restore the experience in a different form" - Dasein, Being There.

Yoga activity augments the ongoing process of "being there" - it snuffs out preoccupations with  thoughts of existence at "arms length". Instead Yoga aims to remove the fears of snuffing out of existence.
The absence of existential anxiety is a sensation akin to nirvana.