Do to others,
As you would
Do to you.
Πάντα οὖν ὅσα ἐὰν θέλητε ἵνα ποιῶσιν ὑμῖν οἱ ἄνθρωποι, οὕτως καὶ ὑμεῖς ποιεῖτε αὐτοῖς· οὗτος γάρ ἐστιν ὁ νόμος καὶ οἱ προφῆται.
This saying of Jesus is nearly the same as in Luke, chapter 6:31, indicating a common Q source, except that Luke never mentioned the Law and the prophets. This saying is often known throughout the world as the philosophical golden rule. In everything, whatever you wanted other men to do to you (Πάντα οὖν ὅσα ἐὰν θέλητε ἵνα ποιῶσιν ὑμῖν οἱ ἄνθρωποι), you should do to them the same (οὕτως καὶ ὑμεῖς ποιεῖτε αὐτοῖς). Matthew emphasizes that this already was in the Hebrew scriptures in the Torah, the Law (οὗτος γάρ ἐστιν ὁ νόμος), and among the various Judaic prophets (καὶ οἱ προφῆται). Pure and simple, treat other people the way that you would want to be treated.