The following are established facts and principles that all rational people agree upon:
1. The invalidity of determination without a determining factor.
2. The invalidity of an infinite sequence.
3. The invalidity of the vicious circle.
4. The law of causality.
Lest examine 1st: The invalidity of determination without a determining factor:
This universe that is in existence must fall under one of three possibilities with respect to the nature of its existence:
1. Its existence is necessary.
2. Its existence is impossible.
3. Its existence is possible.
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See your surroundings.There are Signs for the Watchful.Indeed it is not that if you cannot see God that means God is not there.Now you may say I find every thing in the universe happening on its own.For this explanation the example is,If I sign a cheque using a pen,people say that I have signed the cheque and not the pen.Similarly,when clouds rain,fields produce crops,etc. we see that these are all happening through a very very sophisticated process which cannot be done with the entire wealth and knowledge of the world even today.These processes are controlled by God(like the cheque is signed by the person) and is not happening on its own(like the pen is signing the cheque which is just half truth).There are so many things in the world that happen but still we cant see those things happening,but they happen.It is the signs and not science that will tell you that if God is there or not.One such sign is that there are Jews,Christians and Muslims which are a considerable part of the world