Many of the characters in Henry IV, Part 1 are motivated by -- even obsessed with -- honor (and its opposite dishonor), including King Henry, Hotspur and Prince Hal. When Prince Hal reconciles with his father in Act 3, for example, he pledges to expunge his dishonor by defeating Hotspur in battle:
For every honor sitting on his helm,
Would they were multitudes, and on my head
My shames redoubled! For the time will come
That I will make this northern youth exchange
His glorious deeds for my indignities. (3.2.147-51)
Yet, Falstaff will have none of that rhetoric. While he is also a warrior, he is more interested in surviving the battle than earning honors -- and he is not averse to taking credit for other soldier's feats of arms. In his famous speech on the eve of battle, he mocks and undercuts the rhetoric of honor:
Honor pricks me on. Yea, but how if honor prick me off when I come on?
How then? Can honor set to a leg? No. Or an arm? No. Or take away the grief
of a wound? No. Honor hath no skill in surgery, then? No. What is honor?
A word. What is that word "honor"? Air. A trim reckoning. Who hath it?
He that died o' Wedenesday. Doth he feel it? No. Doth he hear it? No.
'Tis insensible, then? Yea, to the dead. But will it not live with the living?
No. Why? Detraction will not suffer it. Therefore, I'll have none of it.
Honor is a mere scutcheon. And so ends my cathecism. (5.1.131-42)
Given this collision of attitudes, what is the play saying about honor? Is it a good? Is it related to virtue? Or is it harmful value and a dangerous rhetorical concept? Is honor a noble ideal or a "mere scutcheon"?