The Sermon on the Mount is a beautiful thing.<quoted text>
Even that Jesus adapted from the existing Jewish text
Love your neighbor as yourself: I am the LORD.
The Beatitudes etc. Good stuff.
If not mistaken, isn't Hinduism the oldest religion (still in practice that is)?:
One should never do that to another which one regards as injurious to one’s own self. This, in brief, is the rule of dharma. Other behavior is due to selfish desires.
—Brihaspati, Mahabharata (Anusasana Parva, Section CXIII, Verse 8)