Original nature simply means your buddha nature.
Rebirth means consciousness reborns.
Doesn't contradict.
Life (Self) is nothing other than
the continuous flow of the Now Moment.
The Now Moment ceases as it arises. This moment must completely
ceased
and serves as the CAUSE for the next moment to arise.
Therefore Self is a process of series Self1, Self2, Self3, Self4,
Self5, Self6...etc
A fixed entity 'Self' does not exist, what really exists is a
momentary Self.
Under deep meditation, one is able to observe and sense the karmic
and mental factors from moment to moment,
it is these factors that are succeeded from moment to moment and
life and life but not a fixed entity.
When the karmic and mental factors subsides, it is known as "The
True and Only (and Inherently egoless) Conscious Light
(Itself)".
- Thusness
Conscious Light is
original face. In Tibetan terms it is known as Clear Light, or just
Luminosity. In Pure Land terms it is Ji4 Guang1.