Learning is acquiring new or modifying existing knowledge
Knowledge is a familiarity with someone or something unknown, which can include information, facts, descriptions, or skills acquired through experience or education. It can refer to the theoretical or practical understanding of a subject...

, behavior
Behavior or behaviour refers to the actions and mannerisms made by organisms, systems, or artificial entities in conjunction with its environment, which includes the other systems or organisms around as well as the physical environment...

s, skill
A skill is the learned capacity to carry out pre-determined results often with the minimum outlay of time, energy, or both. Skills can often be divided into domain-general and domain-specific skills...

s, value
Value (personal and cultural)
A personal or cultural value is an absolute or relative ethical value, the assumption of which can be the basis for ethical action. A value system is a set of consistent values and measures. A principle value is a foundation upon which other values and measures of integrity are based...

s, or preference
-Definitions in different disciplines:The term “preferences” is used in a variety of related, but not identical, ways in the scientific literature. This makes it necessary to make explicit the sense in which the term is used in different social sciences....

s and may involve synthesizing different types of information
Information in its most restricted technical sense is a message or collection of messages that consists of an ordered sequence of symbols, or it is the meaning that can be interpreted from such a message or collection of messages. Information can be recorded or transmitted. It can be recorded as...

. The ability to learn is possessed by humans, animals and some machines
Machine learning
Machine learning, a branch of artificial intelligence, is a scientific discipline concerned with the design and development of algorithms that allow computers to evolve behaviors based on empirical data, such as from sensor data or databases...

. Progress over time tends to follow learning curve
Learning curve
A learning curve is a graphical representation of the changing rate of learning for a given activity or tool. Typically, the increase in retention of information is sharpest after the initial attempts, and then gradually evens out, meaning that less and less new information is retained after each...


Human learning may occur as part of education
Education in its broadest, general sense is the means through which the aims and habits of a group of people lives on from one generation to the next. Generally, it occurs through any experience that has a formative effect on the way one thinks, feels, or acts...

, personal development
Personal development
Personal development includes activities that improve awareness and identity, develop talents and potential, build human capital and facilitates employability, enhance quality of life and contribute to the realization of dreams and aspirations...

, school or training
The term training refers to the acquisition of knowledge, skills, and competencies as a result of the teaching of vocational or practical skills and knowledge that relate to specific useful competencies. It forms the core of apprenticeships and provides the backbone of content at institutes of...

. It may be goal-oriented
The concept of goal orientation was developed to describe variability in dispositional or situational goal preferences that an individual implicitly sets for him/herself in achievement situations. GOs assist in providing a motivational framework for how individuals perceive, interpret, and judge...

 and may be aided by motivation
Motivation is the driving force by which humans achieve their goals. Motivation is said to be intrinsic or extrinsic. The term is generally used for humans but it can also be used to describe the causes for animal behavior as well. This article refers to human motivation...

. The study of how learning occurs is part of neuropsychology
Neuropsychology studies the structure and function of the brain related to specific psychological processes and behaviors. The term neuropsychology has been applied to lesion studies in humans and animals. It has also been applied to efforts to record electrical activity from individual cells in...

, educational psychology
Educational psychology
Educational psychology is the study of how humans learn in educational settings, the effectiveness of educational interventions, the psychology of teaching, and the social psychology of schools as organizations. Educational psychology is concerned with how students learn and develop, often focusing...

, learning theory
Learning theory (education)
In psychology and education, learning is commonly defined as a process that brings together cognitive, emotional, and environmental influences and experiences for acquiring, enhancing, or making changes in one's knowledge, skills, values, and world views . Learning as a process focuses on what...

, and pedagogy
Pedagogy is the study of being a teacher or the process of teaching. The term generally refers to strategies of instruction, or a style of instruction....

Learning may occur as a result of habituation
Habituation can be defined as a process or as a procedure. As a process it is defined as a decrease in an elicited behavior resulting from the repeated presentation of an eliciting stimulus...

 or classical conditioning
Classical conditioning
Classical conditioning is a form of conditioning that was first demonstrated by Ivan Pavlov...

, seen in many animal species, or as a result of more complex activities such as play
Play (activity)
Play is a term employed in ethology and psychology to describe to a range of voluntary, intrinsically motivated activities normally associated with pleasure and enjoyment...

, seen only in relatively intelligent animals.

"A learning experience is one of those things that says, 'You know that thing you just did?' Don't do that.'" ~Douglas Adams

"A man spends the first year of his life learning that he ends at his own skin, and the rest of his life learning that he doesn't" ~Saul Gorn

"A samurai once asked Zen Master Hakuin where he would go after he died. Hakuin answered 'How am I supposed to know?' :'How do you know? You're a Zen master!' exclaimed the samurai. :'Yes, but not a dead one,' Hakuin answered." ~Zen mondo

"At the moment you are most in awe of all there is about life that you don't understand, you are closer to understanding it than at any other time." ~Jane Wagner

"Education that consists in learning things and not the meaning of them is feeding upon the husks and not the corn." ~Mark Twain

"Enlightenment is intimacy with all things." ~Jack Kornfield

"First, master your instrument. Then forget all that $&%& and play!" ~Charlie Parker

"For every person who wants to teach there are approximately thirty who don't want to learn - much." ~W.C. Sellar and R.J. Yeatman

"I am still learning." ~Michelangelo's motto