What understanding can I try to use in order to never see another persons negative qualities?
"People's faults are their gutters. Even the gutters in the streets are kept covered. A young child knows not to keep the gutters and sewers open. If you have a kitchen, surely you will have a gutter outside and you will always keep the gutter covered with a lid. People have certain faults; a person may be cranky or angry - to look at their negative qualities, is equivalent to opening up a sewer. It is better to look at their good qualities instead. You only need to look at your own gutter and keep it clean, so it does not clog up. People do not realize that their drains are clogging up, and if they did, would they know how to take care of the problem?
They reach their limitations, and that is why all the disease sets in. Through reading the scriptures they learn to say, "You should not speak ill of others!" And although they go around exclaiming this, the underlying gossiping continues. Whenever you utter even the slightest negativity about anyone, you have undoubtedly caused damage. No one opens the lids of the outside physical gutters, but people tend to keep opening other people's gutters."