Treat others the way they treat you
-> Treat others the way you want to be treated
-> Treat others the way they want to be treated
The first level is eye for an eye. They treat you well, you treat them well. They treat you bad, you treat them bad. There is a vengeance and cruelty to it.
The second level is narcissistic. You train and build yourself up with firm values, and then assert them on others regardless of whether it is right for the other person or not. You don’t acknowledge the beauty there is in the uniqueness of every person. You don’t acknowledge that people are individuals to be treated differently. You treat them all the same based on your own thoughts.
The third level is compassionate and respectful. You listen, empathize, then give according to how they wish to receive. The only way to effectively give love is to understand how the other person receives love. How they receive love in reality is often not the same as what they say in words, because they may lack self awareness or there could be miscommunication. Try different ways of giving love, and watch how they react. Go with what they like and enjoy receiving, not what you like to give.