Dualism :- Dualism means belief in duo...Here God and Soul....Dualists are those who follow dualism. The Dualists believe that God , who is the creator of the universe and its ruler, is eternally separate from nature,eternally separate from the human soul..God is eternal.nature is eternal and so are all souls.Nature and Souls become manifested and change but God remains the same....According to dualists,God has qualities not that he has body.He has human attributes..is merciful,just,powerful..In one word God is a human..but only infinitely greater than man.."GOD"--He is the repository of an infinite number of blessed qualities(Dvaita philosophy)..There are same non-Vedantic dulists called 'Atomists' who believe that this universe is made up of tiny atoms and God 's will acting upon this atoms creates this universe...Vedantic dualists deny Atomists saying they are perfectly illogical..The vast mass of people in this world are dualists .
.Human nature ordinarily cannot conceive of anything higher.The ordinary man cannot think of anything concrete...This means Man can only conceive higher spiritual ideas by bringing them to his own level . Dualism is the religion of the masses all over the world . They believe in god who is entirely sepatate from them . They gibe Him all good qualities and remove the evil qualities from Him..As if it were ever possible for good to exist without evil;as if there could be any conception of light without darkness...
Non-dualism :- Non-dualism means belief in unity.Thats believe in Soul and only in Soul..They dont separate God and Soul..Advaita is the Vedantic philosophy which propogates Non-Dualism.It is too abstruse,too elevated to be the religion of the masses..Even in India,its birth place, where it has been ruling supreme for the last three thousand years,it has not been able to difficult for even the most thoughtful man and woman in any country to understand Avaitism..
All the non-dualistic principles are blogged in my previous blog(http://pitroak.blogspot.com/2011/07/advaita-mt-everest-for-layman.html)