Operational Psychology is based upon five concepts and principles.

I. Mind = Desires/Fears/Priorities.

II. Feelings = Reactions to Realizations of Desires/Fears/Priorities.

III. Feelings develop in a Desire/Realization/Feeling Sequence, or D/R/F Sequence:

1. Desire: _____ (?) [Wanting a person/Object/event]
2. Realization: _____ (?) [Person/Object/event achieved/not avoided]
3. Feeling: _____ (?) [Reaction to the Realization of the Desire]

IV. Mental Problems/Mental Disorders = Unrealistic Desires, Fears and Priorities.

V. Mental Solutions/Mental Health = Realistic Desires, Fears and Priorities.

Desire->Realization->Feeling.

Desire = Wanting a person/object/event.

Object = Thing, a unity which retains its identity longer than a related event.

Examples: Jane, a ball, and Dick.

Concept = Mental representation/idea of a object.

Observation: An individual approaches a desired person/object/event; approach behavior.

Event = Relationship between/among objects; has a shorter duration than related objects; a causal explanation of the relationship between/among objects.

Example: Jane throws the ball to Dick. Jane causes the ball to be thrown to Dick. Relationship = Jane to the ball to Dick.

Principle = Mental representation/idea of an event, a relationship between/among objects; a causal explanation of a relationship between/among objects.

Fear = Not-wanting a person/object/event.

Observation: An individual avoids a feared person/object/event; avoidance behavior.

Desires and fears are interrelated by being opposites.

Priority = The importance of each desire/fear compared to all other desires/fears.

Observation: An individual's priority for a desire or fear is the intensity with which he approaches a desired person/object/event or avoids a feared person/object/event; the duration in time of his approach to a desired person/object/event or his avoidance of a feared person/object/event and/or the effort he makes to approach desired people/objects/events and avoid feared people/objects/events.

Note: The term 'desire(s)' can be used to designate all desires/fears/priorities for convenience.

Realization = Persons/object/events achieved/not achieved or avoided/not avoided; realizations are positive when an individual achieves desired people/objects/events and avoids feared people objects/events and realizations are negative when an individual does not achieve desired people/objects/events and does not avoid feared people/objects/events.

An individual’s self-esteem (SE) is (A) his perception of himself and (B) his reaction to his perception of himself. Thus, self-esteem involves a self-perception and a feeling which is a reaction to that perception.

If an individual has a desire, D (for a person/object/event), and a realization, R (a person/object/event achieved nor not achieved), of that desire, then as he achieves more of his desire his level of happiness increases, and if he achieves less his level of happiness decreases.

SEi = Ri/Di x 100%

Where

SE = Self-Esteem
D = Desire [Wanting a Person/Object/Event]
R = Realization of a Desire [Person/Object/Event Achieved/Not Achieved]
i = Identification number, i

NOTE: Happiness = SET = 51% (or higher); Unhappiness = SET = 49% (or lower).
NOTE: The SEi expression describes a straight-line or linear function wherein increases or decreases in R/Realizations produce direct increases or decreases in an individual’s SEi;  the individual may not experience such direct linear functions, and, if so, then the SEi expression may require a function number that would produce a curvilinear (nonlinear) increase/decrease in SEi.

The SEi mathematical expression serves for one Desire, Di, and its Realization, Ri.

The SET mathematical expression accounts for all desires and realizations an individual might have.

SET = (R1/D1 x P1 x 100%) + (R2/D2 x P2 x 100%) + ... + (Rn/Dn x Pn x 100%)

Where:

SET = Self-Esteem Total
D = Desire [Wanting a Person/Object/Event]
R = Realization of a Desire [Person/Object/Event Achieved/Not Achieved
P = Priority [The Importance of Each D/Desire]
n = The last number, n, of a series

NOTE: All P/Priorities must sum up to (add up to) 1.00.
NOTE: Happiness = SET + 51% (or higher); Unhappiness = SET = 49% (or lower).
NOTE: The SET expression describes a straight-line or linear function wherein increases or decreases in R/Realizations produce direct increases or decreases in an individual’s SET;  the individual may not experience such direct linear functions, and, if so, then the SET expression may require a function number that would produce a curvilinear (nonlinear) increase/decrease in SET.
NOTE: The SET expression recognizes that an individual has a multitude of D/Desires (and F/Fears), each having its own P/Priority, and each having its own R/Realization.
NOTE: The SET expression also recognizes that as a result of changes in an individual’s physiology (body) and psychology (mind) his D/Desires, P/Priorities, and R/Realizations change, and, as a result, his SET changes from moment to moment, and yet, over a period of time, his SET is likely to maintain a average level.
NOTE: The SET expression suggests that an individual is not likely to achieve 100% of his D/Desires at R/Realizations of 100% and thus experience a long-term SET of 100%; but it also suggests that an individual is likely to achieve at least some of his D/Desires at R/Realization levels and thus never experience a long-term SET of 0%.