"Verily thou art a knave, and not stunted in wit,
That thou hast bethought thee to utter such a word.
Now therefore let Earth be witness to this,
And the broad heaven above, and the down-flowing water of the Styx,
Which is the greatest and most dread oath for the blessed gods,
That I will not plot against thee any fresh mischief to thy hurt.
Nay, I have such thoughts in mind, and will give such counsel,
As I should devise for mine own self, if such need should come on me.
For I too have a mind that is righteous,
And the heart in this breast of mine is not of iron,
But hath compassion."
Homer, Odyssey. Book V