Let us look at we all have in common – every single person has both a body and a soul (spirit – life force – in fact consciousness) the needs of the body are really simple – it needs to a. survive – to do this, apart from the most sophisticated mechanism within the body (the heart for-example, is the most efficient pump in the world – there is no man-made pump that would be able to do, what it does for a year) the immune system etc., the body obviously needs food (and healthy food, that help its continual process of new cells be healthy,) the body needs various vitamins, such as vitamin D (from the sun) it needs exercise (it is based on the principle of old cells dying and new healthy cells taking their place – in terms of the body, all it needs, is to survive – we also have a soul (spirit, life force – consciousness) our soul eventually realizes, that, just surviving is meaningless – hence on a core level, we seek to live meaningful lives, as Einstein said: a life of giving, is a life worth living