The first principle, That on which all else is based is Consciousness.
Being Conscious, Conscious Being.
This IS before all else appears.
This is what we Are.
The ground of All being.
And on this and as this the story of a person unfolds.
To be able to understand This experientially, one can for instance
imagine oneself in, or actually go into a room
where there is no light at all, no sound at all, no smell at all
where there is no sensory stimuli of any kind.
And when the body is at ease and therefor not noticed,
and if one can push the pause button on thoughts for a few moments.
What do you notice??
This is IT.