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.