Your life develops according to the results of what you have done. You live your life receiving back what you have done so far. It is you who get back the results of what you have done, and no one else does. That is called karma, which means you take responsibility for the result of what you did.
It is a law of thorough self responsibility, and a promise that your territory will not be invaded by others. Therefore people can push their decisions through and humbly accept the results of what they did. All your matters begin with yourself and return to yourself. You may think that sometimes you receive the results of what others did. But if you look back again, you will find out that it is caused by yourself. Whether it is small or big, whether it is one percent or 99 percent of the cause, you will realize that it begins with yourself. It is not others' fault.