Ageing
Ageing or aging (see spelling differences) is the process of becoming older. The term refers especially to human beings, many animals, and fungi, whereas for example bacteria, perennial plants and some simple animals are potentially immortal. In the broader sense, ageing can refer to single cells within an organism which have ceased dividing (cellular senescence) or to the population of a species (population ageing).
Health
Health is the ability of a biological system to acquire, convert, allocate, distribute, and utilize energy with maximum efficiency. The World Health Organization (WHO) defined human health in a broader sense in its 1948 constitution as "a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity." This definition has been subject to controversy, in particular as lacking operational value, the ambiguity in developing cohesive health strategies and because of the problem created by use of the word "complete", which makes it practically impossible to achieve. Other definitions have been proposed, among which a recent definition that correlates health and personal satisfaction.
Psychology
Psychology is the science of behavior and mind, including conscious and unconscious phenomena, as well as feeling and thought. It is an academic discipline of immense scope and diverse interests that, when taken together, seek an understanding of the emergent properties of brains, and all the variety of epiphenomena they manifest. As a social science it aims to understand individuals and groups by establishing general principles and researching specific cases.
Research
Research comprises "creative and systematic work undertaken to increase the stock of knowledge, including knowledge of humans, culture and society, and the use of this stock of knowledge to devise new applications." It is used to establish or confirm facts, reaffirm the results of previous work, solve new or existing problems, support theorems, or develop new theories. A research project may also be an expansion on past work in the field. Research projects can be used to develop further knowledge on a topic, or in the example of a school research project, they can be used to further a student's research prowess to prepare them for future jobs or reports. To test the validity of instruments, procedures, or experiments, research may replicate elements of prior projects or the project as a whole. The primary purposes of basic research (as opposed to applied research) are documentation, discovery, interpretation, or the research and development (R&D) of methods and systems for the advancement of human knowledge. Approaches to research depend on epistemologies, which vary considerably both within and between humanities and sciences. There are several forms of research: scientific, humanities, artistic, economic, social, business, marketing, practitioner research, life, technological, etc.
Psychology
One of the symptoms of an approaching nervous breakdown is the belief that one’s work is terribly important.
Bertrand Russell in: The Conquest of Happiness, Routledge, 12 October 2012, p. 48
Psychology
Unlike the physicist, the psychologist … investigates processes that belong to the same order — perception, learning, thinking — as those by which he conducts his investigation.
Morris R. Cohen, Reason and Nature (1953), p. 81
Psychology
Truly, if you want to ascertain what love there is in you or in another person, then pay attention to how he relates himself to one who is dead. If one wishes to observe a person, it is very important for the sake of the observation that one, in seeing him in a relationship, look at him alone. When one actual person relates himself to another actual person, the result is two, the relationship is constituted, and the observation of the one person alone is made difficult. In other words, the second person covers over something of the first person; moreover, the second person can have so much influence that the first one appears different from what he is. Therefore a double accounting is necessary here; the observation must keep a special account of the influence the second person has on the person who is the object under observation through his personality, his characteristics, his virtues, and his defects. If you could manage to see someone shadowboxing in dead earnest, or if you could prevail upon a dancer to dance solo the dance he customarily dances with another, you would be able to observe his motions best, better than if he were boxing with another actual person or is he were dancing with another actual person. And if, in conversation with someone, you understand the art of making yourself no one, you get to know best what resides in this person.
Soren Kierkegaard 1847 Works of Love, Hong 1995 p. 347
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