Before I came here I was confused about this subject. Having listened to your lecture I am still confused. But on a higher level.
在我来这里之前，我对这个主题感到困惑。听了你的讲座后，我仍然感到困惑。但是在一个更高的层次上。
I am happy and proud of what I have done， but not completely satisfied.
I don't need a reason to be me.
True understanding comes from grasping the inner structural relationships of a problem.