Another Swift Riddle

Because I am by nature blind,
I wisely choose to walk behind;
However, to avoid disgrace,
I let no creature see my face.
My words are few, but spoke with sense;
And yet my speaking gives offence:
Or, if to whisper I presume,
The company will fly the room.
By all the world I am opprest:
And my oppression gives them rest.







BTW, do us all a favor and keep your answers clean.