Broad minds see goodness, narrow minds see badness.
If don’t acknowledge goodness, one would not feel gratitude, if frequently remember badness, one would not feel serenity.

心寬之人, 常記人善;
心窄之人, 常記人惡;
記不住人善的人, 難有感恩之心;
常記人惡的人, 難有祥和之時.