500
The Friar explains:
"O, mickle is the powerful grace that lies
In plants, herbs, stones, and their true qualities;
For naught so vile that on the earth doth live
But to the earth some special good doth give,
Nor aught so good but, strain'd from that fair use,
Revolts from true birth, stumbling on abuse.
Virtue itself turns vice, being misapplied;
And vice sometimes by action dignified."
What is the danger for good things to be misused for evil?