"When God does not exist, anything is possible." Fyodor Dostoevsky
"If God did not exist, it would be necessary to invent Him." Voltaire
In philosophy, and with reference to God, the ontological argument states that God must exist. He must exist as explained through an inductive look at the nature of perfection and that how, if the superlative epitome of an extant being (in this case, God) can exist in your imagination, he (He) must exist in the world at large. It kind of comes back around on itself when you put forth a Landscape of infinite dimensions, the parameters of which must include a world that is defined exactly as the Bible defines it. From God on down.
"For with God nothing shall be impossible." (Luke 1:37)
With Voltaire, it's understood that he's negating the outcome of Dostoevsky's statement. In other words, God is seen as that giant parent/policeman in the sky bearing down with an unwavering eye. With Gabriel, however, we see that God wants Mary to give birth to Jesus, thus explaining how God truly is to a world that doesn't know how to look at God, if at all.
"Then answered Jesus and said unto them, Verily, verily, I say unto you, The Son can do nothing of himself, but what he seeth the Father do: for what things soever He doeth, these also doeth the Son likewise." (John 5:19)
It really isn't that hard to wrap your mind around Jesus. There's enough of Him elucidated in the New Testament to make an informed decision. If you wanna study out the fine points of any of the arguments for or against God, great. Do it. But when Jesus says "Come unto me", there really isn't any other place to go to get an answer. Believing is the battleground.
"And He said, Therefore said I unto you, that no man can come unto me, except it were given unto him of my Father." (John 6:65)
In closing, I can't really say I ascribe (subscribe/agree) to the ontological argument. Following the same logic, simplistically explained, you can make the case for all sorts of imaginary things. Which may or may not exist. The thing is, it ends in sounding like circular reasoning (it's true because it's true) and that doesn't do one any good when what we need is a relationship with One who loves us.
"If God didn't exist, who would love us?"