BEHAVIOR, n. Conduct, as determined, not by principle, but by breeding. The word seems to be somewhat loosely used in Dr. Jamrach Holobom's translation of the following lines in the Dies Iræ:
Recordare, Jesu pie,
Quod sum causa tuæ viæ.
Ne me perdas illa die.

Pray remember, sacred Savior,
Whose the thoughtless hand that gave your
Death-blow. Pardon such behavior.

behavior is something you can do right now or at another specific point in time. You can turn off your phone. You can eat a carrot. You can open a textbook and read five pages. These are actions that you can do at any given moment. In contrast, you can’t achieve an aspiration or outcome at any given moment. You cannot suddenly get better sleep. You cannot lose twelve pounds at dinner tonight. You can only achieve aspirations and outcomes over time if you execute the right specific behaviors.

A behavior is something you can do right now or at another specific point in time.

Behavior is what a man does, not what he thinks, feels, or believes.

To understand the relationship between behavior and brain one has to begin by defining the function, or computational goal, of a complete behavior. Only then can a neuroscientist determine how the brain achieves that goal.

The behavioral doctrine was that human beings were motivated according to their primary drives of hunger, thirst, elimination, pain, and sex.

All human behavior has a reason. All behavior is solving a problem.

Human behavior is a series of lunges, of which, it is sometimes sensed, the direction is inevitable.

Some people seem to think that behavior is behavior only when it is a mystery, Hall continued. But once any piece of behavior is understood at the molecular level, it all comes down to metabolism, whether we are talking about the way a weaver ant folds a leaf, a weaverbird weaves a hanging nest, a human being learns and speaks Swahili, or a fly rises with the dawn and settles down at dusk. “Benzer was once subjected, in my earshot,” Hall said, “to some dumb question like ‘Is that the mind or the brain?’ But every aspect of mind and brain is ultimately metabolism! What do we think? Some kind of electric aura hovers around our heads?” We still seem to want something outside the mechanism, Hall said, some deus ex machina to save us from the clockwork that we have been exploring above and inside our heads for the last several centuries. It is now time for us to accept that behavior is as much a part of the material world as the stars above us and the atoms inside us. All behavior turns on molecular clockwork, Hall said, yet all behavior is fascinating.

Behaviour is the mirror in which we can display our image.

The behavior of two individuals, consisting of effort which results in output, is considered to be determined by a satisfaction function which depends on remuneration (receiving part of the output) and on the effort expended. The total output of the two individuals is not additive, that is, together they produce in general more than separately. Each individual behaves in a way which he considers will maximize his satisfaction function. Conditions are deduced for a certain relative equilibrium and for the stability of this equilibrium, i.e., conditions under which it will not “pay” the individual to decrease his efforts. In the absence of such conditions "exploitation" occurs which may or may not lead to total parasitism.

Some of the major drivers of human behavior…

• Safety: Does it provide peace of mind or reduce risk?
• Sex: Does it help them find love or make love?
• Convenience: Does it save time or energy?
• Social norms: Does it help them get along with others?
• Status: Does it improve their standing or help them gain approval?

…which all fit into the larger category of self-interest: How does it serve the person?

From the late 1800s to the late 1900s... science suggested that human beings are the direct byproduct of their own past. [...]

Research now shows that a person’s past does not drive or dictate their actions and behaviors. Rather, we are pulled forward by our future. [...]

From this view, [...] all human-action is goal-driven [or purpose-driven], even if the goal of the behavior isn’t consciously considered by the individual. [...]

There is always a why for everything someone does. That why is their reason or goal for what they’re doing. [...]

While [...] purpose may not [always] be conscious or inspiring, [a person's reason behind their behavior] still exists. Even if the goal is simply immediate gratification or escape, [as in the case of wasting time] on social media.

Behaviour is a mirror in which every one displays his own image.