Yi'shar attacks Vector again. Vector can feel the anger in Yi'shar, and he uses it. But the darkside of the force begins to be felt in Yi'shar. Vector decides the test has gone on long enough, and ends the fight by disarming Yi'shar.
"Now, calm youself. The darkside is beginning to tempt you. Its calling. You're angry, and it will tell you that it has the power to satisfy your anger. Use your anger in a fight to focus your attack, but don't let it drive out your sense of compassion and justice."
Yi'shar stands panting, "I felt it master. I felt the darkside."
Vector, "I know. It was time. You had to feel it before you met the Sith. Yi'shar, in a fight, it will seem like giving in to the darkside is the thing to, the way to end the conflict, even the right way to deal with your enemy. But feel it now. Feel the echoes of the darkside and the pain that it leaves. Feel the terror and the crushing weight, the emptiness."
Yi'shar lowers his head, his eyes closed. "Yes, it's there"
Vector, "Remember that echo. And when we face the Sith, you will be ready to stand against the darkside."