 Every individual person (jīva) is a manifestation or instantiation of the absolute puruṣa, which is present as an undivided whole in every person. The puruṣa is thus the universal aspect in virtue of which we are persons. But each individual person is also a finite particular. The particular aspect of an individual person is derived from the material form or nature (prakṛti ) which supplies the physical body and its adjuncts (sense organs, etc.). Nature (prakṛti) works through three guṇas which are its functional forces, known as existence or beingness (sattva), force of bringing about change (rajas), and force for restrains change (tamas). Sattva exhibits the physical characteristic of buoyancy and illumination, and the psychological characteristic of pleasure. Rajas exhibits the physical characteristic of stimulation and movement and the psychological characteristics of pain and passion. Tamas exhibits the physical characteristic of weight and resistance and the characteristics of dejection and despondency. The disturbance in the equipoise of the three guṇas starts the process of evolution which is the process of creation. As explained in the quote above, each individual person is a unique composition of guṇas that determine her physical and psychological characteristics, for example those with a predominance of tamas will be naturally disposed to resist change and activity.