> Push me down<br>
> and I'll grow.<br>
> Confess our secret<br>
> and I'll go.
>     
> I am the one<br>
> that hides within<br>
> the silencer known<br>
> as the guillotine.
>     
> I punish the<br>
> ones with heart<br>
> and strip away<br>
> their mirth.<br>
>     
> Only talk to me<br>
> if you are insane.<br>
> I'm dangerous, but<br>
> clearly not inane.<br>
>     
> Who am I?