Chinese artist, Chen Chiju, wrote,"Do unto others as you would have others do unto you. But better not expect others to do unto you what you would do unto them."
Your own experience is your best authority. The Truth can be proven through Scientific Experiment.
Put your own "Belief System" to the test. You can repeat the experiment and always get the same results. The definition of insanity is to continue the same action or strategy and continue to get the same unwanted result.
It is a common complaint of people that even though they themselves have always been kind, nice, friendly, helpful, faithful and honest, others continue to abuse them, use them, take them for granted or are unfaithful. People always take advantage of their good nature.
Love yourself, be kind to yourself, respect yourself, protect yourself and treat yourself well...then others will treat you the same as you treat yourself.
In the traditional Judeo-Christian Bible, Jesus is quoted as saying, "Do unto others as you would have them do unto you', and "Judge not lest ye be judged", and "Ye without sin, cast the first stone."
All of these mean basically the same thing. This is how those of Jewish background interpreted His words. The Gnostic interpretation of the same words is "Lay down no law lest ye yourself become entangled by it."
Trying to live by "Do unto others as you would have them do unto you" is very entangling and frustrating. Others don't change and one blames oneself, constantly conscientiously, one beats ones self up while trying to kill the others with kindness. Then one gets angry and begins to judge the others because they are not treating you the way you are treating them. "Women who love too much" practice "doing unto others what they would have others do unto them" One failed relationship after another they learn to be a better doormat, and wonder what they are doing wrong.It is better to be kind to yourself, love yourself, demand respect. Then others will treat you the way you treat yourself.
When you find yourself dealing with contradictions, check your premises. Something you previously believed was wrong. In light and love.