When Jesus said "with what measure ye mete, it shall be measured to you again," he was not talking about being punished. This is how the body of God and its laws operate. Because we are One, that which is done by you is done to you. This includes your thoughts, words, and actions. If you say an unkind word, or cheat, or lie, at some point the same will come back to you. If you treat everyone with respect and say a kind word to everyone you encounter, and you take actions which benefit others, the same will come back to you. This coming back, like a boomerang, rarely happens immediately and by the same person, so many do not understand the law, because they do not see the correlation. If someone does understand the law, they would realize how important it is to try and be pure in their thoughts, words, and actions.