I believe that any human has the ability to set their mind towards a particular belief of their choice and live their life according to that belief, yes.
How do you know that your belief that Islam is true is not just as misplaced as a Christian, Mormon, Jehova Witness, Hindu, Buddhist, Sikh, Wiccan, Pagan etc...?
No. The technique can only possibly work in Islam. If you make the effort towards Him, Allah will help aid you.
So 'acting' like a believer and eventually becoming a believer - will only work with Islam - and if it doesn't work, then one hasn't tried long enough - or been sincere enough. - Is that right?
I tried for about 5 years. Was that not long enough?
Can this 'method' ('acting' like a believer and eventually becoming a believer) ever fail - if one is truly sincere?
Is there any way you would ever accept that someone was sincere and tried but still didn't believe through no fault of his own?
Well, what if you found out that the 'spirit world' was real with the implication that we do indeed have 'souls' or a spirit body that will continue to exist after this terrestrial body passes away? Would that help you with the idea that revealed Scripture may be different than what your atheistic mind was lead to believe while on the course of Godlessness?
Perhaps.
The rules state that you must believe. Whether you accept it or not, you cannot say that you don't know the rules. The rules exist independent of your decision to believe or not.
Which rules are they? The Qur'an is not the only one out there. Is it the ones that say the only way to the father is through his son Jesus Christ and if I don't accept him I will suffer eternal damnation? Or the Hindu belief that I will be reborn into a higher state if I follow their scriptures?
How do I know which one is right?
Your tantrum
Was that necessary?
Have I been rude to you?
you are blameworthy for rejecting belief, because that is an actual violation of the rules of the game.
How can someone be blamed for breaking rules when they have no way of knowing which rules are the ones they shouldn't break?
There are lots of rules out there?
You are also breaking rules.
How can one know which one is right?
Because Islam is the one your Lord has perfected for you according to the Book that closes the canon of Revealed Sacred Scripture.
How do I know that?
It is a matter of faith.
Very true!
But Christians, Hindus, Mormons, Jehova Witness', etc... all have faith.
Why should having faith in something that contradicts reason be a good basis for eternal joy or eternal torture?