A human being always acts and feels and performs in accordance with what he imagines to be true about himself and his environment...For imagination sets the goal ‘picture’ which our automatic mechanism works on. We act, or fail to act, not because of ‘will,’ as is so commonly believed, but because of imagination.
Happiness is a mental habit, a mental attitude, and if it is not learned and practiced in the present it is never experienced. It cannot be made contingent upon solving some external problem. When one problem is solved, another appears to take its place. Life is a series of problems. If you are to be happy at all, you must be happy - period! Not happy "because of".
Our errors, mistakes, failures, and sometimes even our humiliations, were necessary steps in the learning process. However, they were meant to be means to an end - and not an end in themselves. When they have served their purpose, they should be forgotten. If we consciously dwell on the error, or consciously feel guilty about the error and keep berating ourselves because of it, then - unwittingly - the error or failure itself becomes the "goal" that is consciously held in imagination and memory.
I have found that one of the commonest causes of unhappiness among my patients is that they are attempting to live their lives on the deferred payment plan. They do not live, or enjoy life now, but wait for some future event or occurrence. They will be happy when they get married, when they get a better job, when they get the house paid for, when they get the children through college, when they have completed some task or won some victory. Invariably, they are disappointed.
It is common knowledge among psychologists that most of us underrate ourselves, short-change ourselves, sell ourselves short. Actually, there is no such thing as a superiority complex. People who seem to have one are actually suffering from feelings of inferiority; their "superior" self is a fiction, a coverup, to hide from themselves and others their deep-down feelings of inferiority and insecurity.