Chorus from Henry V by William Shakespeare

 O for a Muse of fire, that would ascend

The brightest heaven of invention

**

O, indeed! 

These lines form the introduction to Shakespeare's play Henry V. It explains to the audience what they have to to make the story work: how to find it amazing and overwhelming and glorious.

For 'tis your thoughts that now must deck our kings,
Carry them here and there; jumping o'er times,
Turning the accomplishment of many years
Into an hour-glass 

**

The wooden O that's mentioned in the full speech is The Globe Theatre, which was (and is, in its new version) built in the shape of a letter O, with the audience banked up round the stage. A casque is a helmet; gentles are ladies and gentlemen (a little flattery of the audience never did an actor any harm); and puissance is power.

O for a Muse of fire, that would ascend
The brightest heaven of invention,
A kingdom for a stage, princes to act
And monarchs to behold the swelling scene!
Then should the warlike Harry, like himself,
Assume the port of Mars; and at his heels,
Leash'd in like hounds, should famine, sword and fire
Crouch for employment. But pardon, gentles all,
The flat unraised spirits that have dared
On this unworthy scaffold to bring forth
So great an object: can this cockpit hold
The vasty fields of France? or may we cram
Within this wooden O the very casques
That did affright the air at Agincourt?
O, pardon! since a crooked figure may
Attest in little place a million;
And let us, ciphers to this great account,
On your imaginary forces work.
Suppose within the girdle of these walls
Are now confined two mighty monarchies,
Whose high upreared and abutting fronts
The perilous narrow ocean parts asunder:
Piece out our imperfections with your thoughts;
Into a thousand parts divide one man,
And make imaginary puissance;
Think when we talk of horses, that you see them
Printing their proud hoofs i' the receiving earth;
For 'tis your thoughts that now must deck our kings,
Carry them here and there; jumping o'er times,
Turning the accomplishment of many years
Into an hour-glass: for the which supply,
Admit me Chorus to this history;
Who prologue-like your humble patience pray,
Gently to hear, kindly to judge, our play.

**

Gently to hear, kindly to judge...

Well, it'd be nice if we could recover that quaint old talent, would 't it?

Word To Use Today: casque. This comes to us through French from the Spanish casco. Amusingly, it's thought to be basically the same word as cask.

It's not just humans that wear them:

photo of a cassowary by Nevit Dilmen