Truth – is very simple – if something exists it must have a motive – so if we look from bottom up we see everything – let’s look firstly at the lowest human motives – the lowest human motive is revenge – revenge is based on anger – anger is based on a sense that something was unjustified – this sense is actually a function of our ego – for example, if I am a boss and an employee ignores me, I may be angry but not vice-versa GET OVER YOUR EGO! – following ego we have the sex drive – sad to say (though obviously it can be the holiest act but generally) from the perspective of men, the reason this drive exists, is as one Jewish sage writes, God implanted a pleasure in debasing a women (hence the debasement technique of pornography – whereas to women sex is far more about making love) so if you wish to be holy, read Kabbalah on Marital Intimacy – moving right along we have various instinctual needs/pleasures: food, warmth, companionship; moving right along we have a soul, this makes us uniquely human, we wish that our lives should be significant, we wish to add value – and as we are a composite of both a soul and an animal and an ego – well now you know all you need