Christians, what is your VERY BEST arguments for the existence of God?

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two of the best arguments for GODs existence in my opinion is the kalam cosmological argument, hereafter abbreviated as kca, and the arguments from design, teleological argument. the kca is simple beautiful argument that states: 1. everything that begins to exist has a cause outside itself. 2.the universe began to exist. hence it is deduced that the universe has a cause. the first premise is readily observable in everyday life. this universally observed principle undergirds scientific endeavor, if things can be expected to happen uncaused then science becomes meaningless which is a deligent search for causes. the second premise is scientifically upheld aswell as well as philosophically. the vast majority of cosmologist cannot ignore the evidence for the big bang theory, such as the red shift, and background radiation. on the philosophical front an eternal universe is impossible, because an actual infinity cant be realized ontologically. for example in an infinite universe we would expect there to be an infinite number of events to exist before the present moment, meaning that the present would never be realized in a beginningless universe so to speak, it is not possible to traverse an infinite set of events. 2. design in nature shouts out. creator! paley put it nicely with his pocket watch analogy, that if you were to stumble upon a watch in the middle of nowhere your first thought wont be, hey look at what the forces of nature put together, you will rather assume designer. this is because nature has never been observed to assemble such ordered complexity, as for natural selection, it isnt even a force of nature, and it doesnt create complexity, it only explains why nature chooses so to speak one kind of already existing complex feature over another.

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since space-time, and matter/energy began to exist as scientist maintain, the cause of these phenomena has to be non-spatial, what christians would refer to as a spirit, timeless, in other words eternal, it has to be powerful to bring about something as vast and intricate as the universe, the design in nature tells us that it has to be intelligent aswell.