Management
Management (or managing) is the administration of an organization, whether it is a business, a not-for-profit organization, or government body. Management includes the activities of setting the strategy of an organization and coordinating the efforts of its employees (or of volunteers) to accomplish its objectives through the application of available resources, such as financial, natural, technological, and human resources. The term "management" may also refer to those people who manage an organization.
Policy
A policy is a deliberate system of principles to guide decisions and achieve rational outcomes. A policy is a statement of intent, and is implemented as a procedure or protocol. Policies are generally adopted by a governance body within an organization. Policies can assist in both subjective and objective decision making. Policies to assist in subjective decision making usually assist senior management with decisions that must be based on the relative merits of a number of factors, and as a result are often hard to test objectively, e.g. work-life balance policy. In contrast policies to assist in objective decision making are usually operational in nature and can be objectively tested, e.g. password policy.
Security
Security is freedom from, or resilience against, potential harm (or other unwanted coercive change) from external forces. Beneficiaries (technically referents) of security may be persons and social groups, objects and institutions, ecosystems, and any other entity or phenomenon vulnerable to unwanted change by its environment.
Security
Security is mostly a superstition. It does not exist in nature, nor do the children of men as a whole experience it. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure, or nothing.
Helen Keller, The Open Door (1957). This quotation is often contracted into: Security is mostly a superstition... Life is either a daring adventure, or nothing. or paraphrased: Life is either a daring adventure or nothing at all.
Policy
There is no such thing as a fixed policy, because policy like all organic entities is always in the making.
Attributed to Robert Gascoyne-Cecil, 3rd Marquess of Salisbury. M. R. D. Foot, British Foreign Policy Since 1898, p. 9 (1956). Not verified in Salisbury's writings.
Security
No one can build his security upon the nobleness of another person. Two people, when they love each other, grow alike in their tastes and habits and pride, but their moral natures (whatever we may mean by that canting expression) are never welded. The base one goes on being base, and the noble one noble, to the end.
Willa Cather, Alexander's Bridge, Ch. 8 (1912)