Motivation is the internal and external factors that stimulate desire and energy in people to be continually interested and committed to a job, role or subject, or to make an effort to attain a goal. According to
M. J. Gannon: Motivation basically means an individual needs, desires and concepts that couse him or her to act in a particular manner.
Joe Kelly: Motivation is the process where by needs instigate behavior directed towards the goals that can satisfy those needs.
Edwin B Flippo, “Motivation is the process of attempting to influence others to do their work through the possibility of gain or reward.”
Glueck said about motivation as “motivation is the inner state that energizes channels and sustains human behavior.”