This is the Knight's Code:

A Knight is sworn to valour,
Hs heart knows only virtue,
His blade defends the helpless,
His might upholds the weak,
His word speaks only truth,
His wrath undoes the wicked,

Follow these steps and then you shall be a true knight of the Old Code, lending your skills to those who need them and destroying evil. But deviate from this code, by joining evil, you are no longer a true knight.