Final answer:
The ancient saying that does not convey the same idea as the ethic of reciprocity is: "Never contract friendship with a man that is not better than thyself."
Step-by-step explanation:
The ancient saying that does not convey the same idea as the ethic of reciprocity is: "Never contract friendship with a man that is not better than thyself." This saying implies that friendship should only be formed with those who are superior to oneself, which goes against the principle of treating others as you would like to be treated. The ethic of reciprocity, also known as the Golden Rule, emphasizes treating others with kindness and respect, regardless of their superiority or inferiority.