i might be wrong but personally i think something like that if you can eliminate the fear of death completely, you become worry free carefree and joyous happy and full of life. even though it doesnt take away the small sufferings of daily life still the biggest ''outer'' cause of suffering has been eliminated. the rest is done with the six perfections i think. or something. it works. and im not saying i have eliminated the fear of death. i havent, but personally i feel like its the biggest cause of suffering, cause i see it like the ultimate source of clinging, or the last resort of clinging to an i, self , me and mine.
sorry if off topic.
If the thought of demons
Never rises in your mind,
You need not fear the demon hosts around you.
It is most important to tame your mind within....
In so far as the Ultimate, or the true nature of being is concerned,
there are neither buddhas or demons.
He who frees himself from fear and hope, evil and virtue,
will realize the insubstantial and groundless nature of confusion.
Samsara will then appear as the mahamudra itself….