1.
Once Reb Levi Yitzchok was surprised to find a Jewish neighbor smoking a cigarette on Shabbos. He came over to his neighbor and said “You probably began smoking because you didn’t realize it was Shabbos.” “Oh, I know that today is Shabbos,” replied the man. “Then you probably don’t know that one is not allowed to smoke on Shabbos,” Rav Levi Yitzchak continued. “I know that too,” said the man. “Then I suppose you are smoking since it is necessary for your health,” the Rav stated. “No, not at all,” the man responded. At this point, Rav Levi Yitzchak lifted up his eyes to heaven and speaking directing to Hashem said, “See how honest your people are. Even when they commit a sin, they don’t compound it by lying about it!”
2.
The person who judges his neighbor in the scale of merit is himself judged favorably [by Hashem]. (Shabbos 127b)