The majority of people go through life making the same mistakes over and over again. Whether it be in relationships or with money the same errors keep recurring. The path towards a happier and more peaceful existence lies in recognising the mistake and not repeating it.
An example with this is someone who moves from one failed relationship to another because they keep going for the same 'type' of partner, who ultimately is not compatible with them. Or the person who looses money by making one bad investment after another, not recognising they are repeating the same mistake over and over again.
Choose an area in your life that concerns or troubles you. Ask yourself if you are making mistakes and most importantly: Did you learn the lesson yet?