Novardokers specialized in ridiculing the Yetzer Hara with plenty of laughter. When you play something down, it loses its Koach. When you make a joke about a scary person, your fears can diminish. That’s why the Yidden called those giants רפאים Refa’im (weaklings) while the Mo'avim called them: אימים Aim’im (fearsome).
The same person or situation can be looked at in two ways. This is also true about your view of yourself. The way you see yourself, affects your performance.
R' Gershon Liebman Zatzal was always practicing no fear of people. In his formative years in the Yeshiva in Bialystok he ran away from Kavod, and from receiving recognition from people. He was so seasoned in “fearlessness” during peacetime, that by the time WWII broke out, the Nazis didn’t scare him. He was able to accomplish amazing feats, like building a Yeshiva in the ghetto.
They say that the Alter of Slabodka always looked at a person with a brand new Ayin Tova, as if he could change any minute from his evil past. A person should always be oozing with love & Ayin Tova on all of mankind, just like Hashem tolerates the worst Reshaim and always gives a chance for Teshuva.