“Information can be such a double-edged sword.”
“Innocence is a double edged sword - Nothing else can make the world more wonderous or deadly.”
“But the truth is a double-edged sword; it is a dangerous thing.”
“Free will...is a double edged sword. It can either lead you down the roads of peace, joy and happiness or the roads of darkness and despair!”
“Anger is a double edged sword and it generally cuts the one who yields it the deepest”
“Evil is a double-edged sword, if you use it you'll end up cutting you”