Each of these has in turn to survive the preceding and more dense one,
and then die. The exception is the sixth when absorbed into and blended
with the seventh. The "Phatu" * of the old Hindu physiologist had a
dual meaning, the esoteric side of which corresponds with the Tibetan
"Zung" (seven principles of the body).

We Asiatics, have a proverb, probably handed down to us, and by the
Hindus repeated ignorantly as to its esoteric meaning. It has been
known ever since the old Rishis mingled familiarly with the simple and
noble people they taught and led on. The Devas had whispered into every
man's ear--Thou only--if thou wilt--art "immortal." Combine with this
the saying of a Western author that if any man could just realize for an
instant, that he had to die some day, he would die that instant. The
Illuminated will perceive that between these two sayings, rightly
understood, stands revealed the whole secret of Longevity. We only die
when our will ceases to be strong enough to make us live. In the
majority of cases, death comes when the torture and vital exhaustion
accompanying a rapid change in our physical conditions becomes so
intense as to weaken, for one single instant, our "clutch on life," or
the tenacity of the will to exist. Till then, however severe may be the
disease, however sharp the pang, we are only sick or wounded, as the
case may be.

-----------
* Dhatu--the seven principal substances of the human body--chyle, flesh,
blood, fat, bones, marrow, semen.
-----------

This explains the cases of sudden deaths from joy, fright, pain, grief