Take any moment when you feel really fulfilled and examine it closely. Down under the joy, you will find that subtle, all-pervasive undercurrent of tension that no matter how great this moment is, it is going to end. No matter how much you just gained, you are inevitably either going to lose some of it or spend the rest of your days guarding what you have and scheming how to get more. And in the end, you are going to die; in the end, you lose everything. It is all transitory.
