Persuasion

During my life i have learnt that to persuade someone is among the most ironic thing to do.I believe in patterns and believe to give logic to most vague of entitites.Madness has been associated with this phenomenon ,but the plebian doesn't understand the non trivialities of life.The idea of being sane is relative to the times we have lived.So how do we persuade someone to buy or sell, to maintain relationships,to develop new ones,what is the strategy.
personally i have ,analysed everything a person does during my first meeting,from the way of standing ..to the way of thinking .the way the person smiles ,which hand he prefers.... ,i am in habit of dissecting personalities.But after analysis of so many varied personalities ,i realise we act differently to situations,our past experiences,our mentors ,our abilties ot limit plays an important role .That there is no truth,except of what we make ourselves believe .
and that there is no analysis of someone ,unless i am analysing my self

meanwhile exams are happening thing on the block

compilers
uml