Jīva means all living being, but above all living beings, the human being is the most awakened consciousness. Therefore his business is to enquire about the Absolute Truth. It is said, jīvasya tattva-jijñāsā.
- kāmasya nendriya-prītir
- lābho jīveta yāvatā
- jīvasya tattva-jijñāsā
- nārtho yaś ceha karmabhiḥ
- (SB 1.2.10)
means that we have got some desires for gratifying our senses or for the maintenance of the body. Such desires are based on four principles of bodily demands. Every living being is busy, the lower animals and the human being, in finding out where is food, where is shelter, where is sex and where is defense. So they have selected four businesses: where to find out food, where to find out shelter, where to find out sex indulgence and how to defend ourself.