I don't believe in convincing people by talking to them because if you can convince someone to convert to Christianity then another person can convince them to convert something else. I think the best way is to live a holy, godly life, going 100% whole-hearted after God. Your life would be a testament to theirs. They see the joy that we experience. The never ending happiness and the unexplained miracles that occur in our lives. Finally just do what God tells you. If you feel God is telling you to go up to that particular person and express to them how much God loves them and has a plan for their life, then do it. Their reaction is irregardless. It's not our job to make Christians out of non-Christians. It's our job to spread his word and do his will and God will handle the rest. :)

Could you actually prove it, logically? And if you could, then what place would there be for faith?

Allah(GOD) is called many names or maybe many conceptual meanings. everybody knows, feels, and understands GOD as an internal thought even an atheist who denies GOD.

AHAHAHAHAHA! There is, like, ZERO proof for any religion that's been on this earth so far, and a mountain of evidence against every religion that has ever existed. Also, love, charity, and morality are human traits that have been proven--over and over again--to exist independently of supernatural beliefs and religion (in fact, religion has been used to justify so much violence and bigotry in the world, you could probably say that it's probably mutually exclusive to love, charity, and morality at this point). You'll just have to use coercion, censorship, indoctrination, and fallacious arguments to prove your point like the Iranian government does. Good luck with that.

Sunny, The human intellect cannot fully grasp the power or majesty of God. It is only through the human heat that man can know God because to know God is to love God. He that loves, knows God, and "he that does not love, does not know God, for God is Love."