Resh, as the outer part of BeT,
represents the outer REaCHing of BeT. If KaF is what is in the Palm of
the Hand, then ReSh is what Radiates from the Head. That is why ReSh means Head, REaCHing, RuShing and Radiation.
"first born son". These letters BReaK (–
"bend the knee", bless) open Unity and signify the birth of distinction
at each of their levels.