Hahaha! Oh dear, @@Darth Sion -- SuperCarlinBrothers is a Sith! XD
Being a true Jedi Knight means being selfless, living for the Force rather than one's own development or benefit. Jedi are guardians of the Light Side of the Force, of balance and harmony. They are the yin.
In opposition, the Sith are Knights of the Dark Side of the Force, concentrated on progress, control, and self-development (power). They are advocates of the benefits of chaos and individual qualities to make progress. They are the yang.
The amusing thing is that one without the other would cause unbalance. The world needs both, and true harmony lies in-between, in the mutual struggle of these two forces with one another. That is the awareness of a Gray Jedi Knight -- my chosen pathway.