1)
Why is "Haker Panim Lo Tov"?
1.
Malbim: Even if you recognize that a person is trustworthy, you cannot always rely on recognizing the face. Refer to 28:21:2:2.
2)
What is the meaning of "Yifsha Gaver "?
1.
Rashi: He tilts Mishpat.
2.
Malbim: Sometimes in pressed circumstances he lacks food, and even a man who [normally] overpowers his Yetzer, he sins due to food.