Matthew 7:12-14 - The Golden Rule
12 Everything, therefore, be it what it may, that you would have men do to you, do you also the same to them; for in this the Law and the Prophets are summed up.
13 "Enter by the narrow gate; for wide is the gate and broad the road which leads to ruin, and many there are who enter by it; 14 because narrow is the gate and contracted the road which leads to Life, and few are those who find it.