According to Jonathan Edwards' sermon, what is a constant threat to all human beings?

In his famous
sermon ","uses strongand effective persuasion in an attempt to convince his
congregation to repent their sins and turn to God before it is too late and they are sent to
hell forever. Edwards truly believes that people are in constant danger of being sent to hell to
spend an eternity in terrible pain and anguish. One example out of the text that shows this is
the following quote:

"Oh sinner! Consider the fearful
danger you are in: It is a great furnace of wrath, a wide and bottomless pit, full of the fire
of wrath, that you are held over by the hand of that God, whose wrath is provoked and incensed
as much against you, as against many of the damned in hell. You hang by a slender thread, with
the flames of divine wrath flashing about it, and ready every moment to singe it, and burn it
asunder." 

This precarious image of hanging only by
a thread creates worry and near panic in the listener.  Edwards believes the only reason people
haven't already been punished has been that God has been holding them up - but God's patience is
wearing thin, and they are in immediate danger. 

Another example that
illustrates the immediacy of the danger they are in is thecomparing God's wrath to a bow bent
with an "arrow made ready." This image of God's wrath as a weapon ready to spring
further elicits strong emotional reaction - mainly fear.