How do I know what Good or Evil

How do I know what's good or evil. I describe what are good and evil by the persons personality. If they had a good personality by seeing if they would give back items from other people or help other people in need before helping themselves.

If they had an evil personality by seeing if they were greedy and steal valuable items from other people or picking and hurting other people.

Another way of seeing what are good or evil by the clothes they wear outside. To see a good person would be wearing stylish and casual clothes for outside.

To see a evil person would be wearing untidy baggy clothes that look old and dirty. They also have tears in their clothes and don't care about it.

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