  PKS\,1351$-$018 at a redshift of $z=3.71$ is one of the most luminous, steady
synchrotron sources with a luminosity $> 10^{47}$\,erg~s$^{-1}$. The
synchrotron luminosity does not seem to vary by more than $\sim 25\%$ over 35
years. In order to appreciate this remarkable behavior, if it were at $z=0.5$,
it would have a flux density at 15 GHz in a range of $110 - 137$\,Jy over 11
yrs. In spite of this steady behavior, two strong $\gamma$-ray flares $\lesssim
10^{49}$\,erg~s$^{-1}$ were detected in 2011 and 2016. There is blazar-like
behavior coexisting with the steady behavior. This study is aimed at
elucidating the dual nature of this source. We find that the radio source is
extremely compact with a bright core and a steep spectrum secondary component,
12\,mas away, that appears to be constant in position and flux density in six
epochs from 1995 to 2018. We estimate that a jet with a time averaged power of
$(5.2 \pm 3.2) \times 10^{45}$\,erg~s$^{-1}$ terminates in this lobe that is
advancing $\gtrsim 0.9 c$ at a deprojected distance of $1-3$\,kpc from the
central engine. This is the rare case of a young ($\sim 6000$\,yr), very
powerful radio source that is viewed a few degrees from the jet axis. We find
evidence of a high velocity (4000\,km~s$^{-1}$), high ionization wind emanating
form a luminous quasar. The young radio jet appears to experience modest
bending as it navigates through the intense quasar environment.
