It is obvious to anyone (including theists) that if God exists, then he's certainly not doing everything he can to make his existence obvious. For instance, he could write bible verses in the sky, shout in a loud voice, or perform immediate and unambiguous miracles in response to prayers. But, we don't see these things occur, and any event attributed to being an "act of God" is both rare and ambiguous. If God exists and is omnipotent, then it's clear he could be doing more to make his existence an obvious fact. This implies that either God is purposely hiding himself or (the simpler explanation) he doesn't exist. And, when there are two competing explanations for a phenomenon, the simpler one is typically correct.
Some theists attempt to answer this argument by claiming that if God made his existence obvious, then people would no longer have the freedom to make the choice to worship him or rebel against him i.e. everyone would be forced to worship God and free will would no longer exist. But this certainly doesn't follow. Consider the fact that the majority of theists also believe in supernatural beings called demons, as well as a "Satan" which once were angels of God but chose to rebel against him even after observing his unambiguous existence in all of its glory and power. If theists believe that the free will of these demons was not violated by seeing unambiguous evidence for the existence of God, then humans' free will to accept God or rebel against him would not be undermined by God making his existence more obvious. So, this explanation fails.
The only other explanation a theist would offer is that God works in "mysterious ways" and that he must have a good reason for making his existence less than obvious. But, this is not an explanation. A god that acts as if he doesn't exist is functionally equivalent to being non-existent. It is more reasonable to assume that God doesn't exist rather than to assume that God exists and purposely hides his existence, just as it is more reasonable to assume that my closet does *not* contain invisible fairies that hide their existence from me than it is to accept that these invisible fairies exist.
If God was visible then there would be no reason for us to live on earth.
Us living on this earth is a test from God.
God gave us the choice to to obey his commands which will lead us to paradise and if we don't it will lead us to hell.
God sent messengers with the message to believe in one god without a partner. If we do, we need to follow his commands.
The biggest prove of his existence is the Quran (=words of God) which has never been changed since more than 1400 years ago. The Quran itself is a miracle (the biggest miracle).
Some Reasons Why The Qur’an is A Miracle:
• It contains many Scientific Statements even though it has remained exactly the same for over 1400 years - This is accepted by everyone !
For Example It Describes:
Embryology (How a baby forms – Read Prof. Keith Moore)
The Big Bang Theory (The Start of The Universe)
The Expanding Universe
How Gravity Works (Planets 'Swim' in Orbits)
The Construction of Mountains
The Water Cycle (Formation of Clouds)
Pain receptors in the skin
• It contains God’s challenge - to try and produce even one chapter like it. This still stands today !
• It was given to a man who could neither read nor write.
• It’s words have the effect of changing peoples’ lives.
• It does not contain a single contradiction despite the fact it was revealed over a period of 23 years.
• It has produced ‘The Largest Practised Religion’ of about 1.7 billion followers and ‘The Fastest Growing Religion’.
The Qur’an contains Good News and a Warning.
For those who worship The One Almighty God and follow the example of The Messengers of God, there is Good News of success in this life as well as Eternal Paradise in The Hereafter. Those who reject the message are warned of The Hell-fire. The Messengers of Almighty God include:
Abraham, Moses, Jesus and Muhammad (peace be upon them).