My understanding, .

The drive for life and death,

is instinct, .

Human instinct, .

When drowning or a sudden disaster threatens survival,

People will not hesitate to do whatever it takes to survive.

Survival instinct.

In survival When not threatened,

when a person encounters adversity,

is disappointed in his own ability,

will think, and then choose death to escape.

Death instinct.

This is why,

The suicide effect says,

When the threat to survival is greater,

suicide The less likely it is.