  Heisenberg's breakthrough in his July 1925 paper that set in motion the
development of Quantum Mechanics through subsequent papers by Born, Jordan,
Heisenberg and also Dirac (from 1925 to 1927) is reexamined through a modern
lens. In this paper, we shall discuss some new perspectives on (i) what could
be the guiding intuitions for his discoveries and (ii) the origin of the
Born-Jordan-Heisenberg canonical quantization rule. From this vantage point we
may get an insight into Einstein's Quantum Riddle
(Lande1974,Sommerfeld1918,Born1926) and a possible glimpse of what might come
next after the last 100 years of Heisenberg's quantum mechanics.
