Is my sharp-tounged professor happy?

I was reading my book in Civil Procedure but my mind kept on wandering. I still could remember what happened yesterday. I was thinking, maybe my professor has been a diligent student during his time and that it is the reason why he is so very strict and sharp tounged in class discussion. But did being one made him “truly” happy? Even if I’m not going to take up law, I know I will succeed. I may not be as successful like him and I may not own a car someday but inside of me, I feel it, I am fulfilled. I have a family who has been very supportive to me. We are happy and living a decent and modest life. Me and my sister finished degree courses in UP and my brother is in his 3^rd year college. My sister is taking up her master’s degree and me, taking law classes after office hours. But who am I to judge? Each one of us should not judge someone without hearing the facts, seeing and having knowledge of the evidences and applying the law applicable – may it be the law of the land, law of God or the law of heart.