Three principles proposed by nursing theorist, Martha Rogers, which suggest that human nature is dynamic, everchanging, and holistic. Rogers calls the homeodynamic principles “helicy,” “resonancy,” and “integrality.” She asserts that human beings are an integral part of their environment rather than creatures that merely adapt to their environment. Nursing assessment should therefore focus on a person’s experiences, expressions, and perceptions, rather than on his or her coping mechanisms, modes of adaptation, or reactions to illness.