Christians, Jews and idol worshippers cannot lower the Imaan of a pious Muslim as Quran instructs us how to deal with them .But an atheist may deceive a Muslim with his tricky arguments as atheism is a new Fitna, though there some answers to their arguments in Quran.

Let us now try to train ourselves to tackle these forces of devil.
The first thing to be noted is that science can't prove or disprove the existence of God. Existence of God can be realized with reasoning, logic and common sense as Quran advises the same.
Let us first know that is there really a God. when Ahmed Deedat was asked the question 'does god exist' he said, "we exist therefore god exists". this is enough proof for a wise person.
However there is a twist! Richard Dawkins in his book "the God delusions “writes that if this universe is so complex then how complex will be its creator. then who created this God.in order to answer this question let us keep in mind that there have been many theories put forward to explain the existence of this universe. almost all of them have been proven wrong and unsatisfying.one such theory is that our universe came into existence from its parent universe .Now the question arises where did the parent universe come from .say it came from its parent universe then how come this parent universe. This will move on to infinity and if this was true our universe would not have been existing. Another most accepted theory is the Big Bang theory. a huge explosion that happened 13.7 billion years ago and gave birth to space and time. now if u ask what was the cause of this bang u will again fall in the trouble of infinity as above .so the most rational belief someone can hold is that there must be an uncreated being who created this universe otherwise the existence of this universe can never be explained.so it is a fact that there is an uncreated being that is why this universe exists. Now atheists still reject God. they say that it is an uncreated energy which caused Big Bang.Richard Dawkins says in a video clip that whatever this energy is it is very simple. trying to escape the question "who created this energy". But it is illogical .if you ask who created your intelligent God we can also ask who created your mindless energy .because no matter whether a thing is conscious complex or simple the question of "who created it "will apply for all.
No why i choose to believe in an intellectual creator rather than a mindless energy as the cause of everything? There are many reasons but the most astonishing is the human intellect and free will. a mindless energy cannot create a complicated machine like human being .even if we suppose abiogenesis and Darwanism to be true(though it is wrong. watch Dr. James tour's interview about origin of life he exposed miller-urey experiment)still the human intellect and freewill can't be explained. only an intellectual creator will create an intellectual creation ,a mindless process will create a mindless creation.

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