Never admit defeat – never allow yourself to think that people are bad, the world is hell; for that is exactly what the Yetzer Hara wants, rather see the truth, some people are happy – through having or seeing positive experiences (and there is always enough good in life to generate joy if we seek it) and others are miserable, through having or seeing negative experiences – but as people by nature are jealous of each other, hence the sad people – if the cause of their sadness was abuse, hence they stopped loving people (unlike depression, which often the cause is internal shame, with one’s own failures of achieving one’s personal aspirations) thus such sad people unfortunately become jealous (for there is no greater joy than feeling part of a greater whole, not isolated and lonely) and the jealousy creates malice, which creates evil.