The easiest thing to do, whenever you fail, is to put yourself down by blaming your lack of ability for your misfortunes.

Purpose

Multitudes of people, drifting aimlessly to and fro without a set purpose, deny themselves such fulfillment of their capacities, and the satisfying happiness which attends it. They are not wicked, they are only shallow. They are not mean or vicious; they simply are empty -- shake them and they would rattle like gourds. They lack range, depth, and conviction. Without purpose their lives ultimately wander into the morass of dissatisfaction. As we harness our abilities to a steady purpose and undertake the long pull toward its accomplishment, rich compensations reward us. A sense of purpose simplifies life and therefore concentrates our abilities; and concentration adds power.