`A whetston is no kerving instrument,
And yet it maketh sharpe kerving-tolis.
And ther thou woost that I have ought miswent,
Eschewe thou that, for swich thing to thee scole is;
Thus ofte wyse men ben war by folis. 635
If thou do so, thy wit is wel biwared;
By his contrarie is every thing declared.

`For how might ever sweetnesse have be knowe
To him that never tasted bitternesse?
Ne no man may be inly glad, I trowe, 640
That never was in sorwe or som distresse;
Eek whyt by blak, by shame eek worthinesse,
Ech set by other, more for other semeth;
As men may see; and so the wyse it demeth.

`Sith thus of two contraries is a lore, 645
I, that have in love so ofte assayed
Grevaunces, oughte conne, and wel the more
Counsayllen thee of that thou art amayed.
Eek thee ne oughte nat ben yvel apayed,
Though I desyre with thee for to bere 650
Thyn hevy charge; it shal the lasse dere.

`I woot wel that it fareth thus by me
As to thy brother Parys an herdesse,
Which that y-cleped was Oenone,
Wrot in a compleynte of hir hevinesse: 655
Ye say the lettre that she wroot, y gesse?'
`Nay, never yet, y-wis,' quod Troilus.