All the commandments: You shall not commit adultery, you shall not kill, you shall not steal, you shall not covet, and so on, are summed up in this single command: You must love your neighbor as yourself. – Jesus Christ
If you love those who love you, what credit is that to you? For even sinners love those who love them. And if you do good to those who do good to you, what credit is that to you? For even sinners do the same. – Jesus Christ