The dew shall weep thy fall tonight,
For thou must die.
Sweet rose, whose hue, angry and brave,
Bids the rash gazer wipe his eyes:
Thy root is ever in its grave,
And thou must die.
Sweet spring, full of sweet days and roses,
A box where sweets compacted lie:
My music shows ye have your closes,
And all must die.
Only a sweet and virtuous soul,
Like seasoned timber, never gives;
But though the whole world turn to coal,
Then chiefly lives.
The burning of the whole world down to coal refers to the Last Judgment, often imaged with fire (i.e.  Mt 13 :40-43, “Just as the weeds are collected and burned up with fire, so will it be at the end of the age. The Son of Man will send his angels, and they will collect out of his kingdom all causes of sin and all evildoers, and they will throw them into the furnace of fire, where there will be weeping and gnashing of teeth. Then the righteous will shine like the sun in the kingdom of their Father. Let anyone with ears listen!”). 
 The virtuous soul has eternal value in the eyes of the one who comes to judge the earth.