If we have to walk across rough and thorny ground, one way of protecting our feet is to cover the whole ground with leather…

If we have to walk across rough and thorny ground, one way of protecting our feet is to cover the whole ground with leather, but this is not very practical. We can achieve the same result in a much simpler way - by covering our feet. Similarly, if we wish to protect ourself from suffering we can either try to change the whole world to make it conform to our wishes, or we can change our mind.