  Further investigation of data on quasars, especially in the ultraviolet band,
yields an amazingly coherent narrative which we present in this paper. Quasars
are characterised by strong continuum emission and redshifted emission and
absorption lines which includes the famous Lyman $\alpha$ forest. We present
irrefutable evidence in support of (1) the entire line spectrum arising in
matter located inside the quasar system, (2) the range of redshifts shown by
the lines being due to the variable contribution of the gravitational redshift
in the observed line velocity, (3) existence of rotating black holes and of
matter inside its ergosphere, (4) quasars located within cosmological redshifts
$\sim 3$, (5) $\gamma$ ray bursts being explosive events in a quasar. These
results are significant and a game-changer when we realise that the absorbing
gas has been postulated to exist along the line-of-sight to the quasar and
observations have accordingly been interpreted.
  In light of these definitive results which uniquely constrain the quasar
structure, we need to drastically revise our understanding of the universe
built on the faulty assumptions of observed redshifts of quasars having an
entirely cosmological origin and the absorption lines arising in the
intervening medium.
