Seeing good in others helps avodas (service) Hashem in all other areas. Look at yourself first! The other's aveiros are a mirro for YOU! Why do we see faults in others? Working on ourselves helps not only us, but others too. Don't judge until you've been in his matzav/shoes. Do we even consider all the good and chessed the other does on a daily basis? Don't judge until you have all the facts. Shabbos allows us to see the truth. Be thankful, and sit together in sholom. Shabbos purifies our eyes.