That is even less enlightening than the text I have provisionally dismissed. This section of the forum provides an opportunity for Christians to offer arguments for their religion. You and jk6661 are not doing an inspiring job of that so far. I'm ready to entertain logical and evidence based arguments. I haven't seen in any yet. I wait with interest.
The op is asking, Why do you believe God exists?
The term 'exists' changes meaning when referring to that which we see/envision as Eternal, and that which we see as a Person.
We cannot prove that that which is Eternal exists as such because it is impossible by definition.
We are Christians and therefore we believe that the Christ is the Personification of God sent by God.
In this way the term God is a Person.
We know the man Jesus existed/exists.
We know that When God is seen as a Person the term God becomes axiomatic since we cannot believe God is a Person without first believing He exists.
We believe there is a Truth that exists, separate and apart from mankind's ability to declare it, in the sense that we first must learn it before we can declare it as Truth.
We know it exists even because we learn it, but we cannot know if it ends when humanity ends. Since we learn of it, we cannot presume it does not exist if people were no longer to exist.
Truth therefore transcends all of humanity yet it is the same Truth for everyone despite the different ways we perceive it and articulate it and the differing levels of knowledge/ignorance that pertains to it.
We believe that since Christ was prophesied to come that we may see the Person of God, God therefore
means the Creator of time and subsequently the Power that brought forth all things within time for the purpose of His being known.
We believe that He therefore exists Eternal as opposed to temporal which the term 'time' implies.
God is therefore synonymous with 'Truth' since He Created it and even is the ultimate Truth to know.
To know Christ is to know Love and to know Love is to know God. God is Love.
Hence God is worshipped not as He Who created us, which is kind of like a self worship.
God is worshipped as that Spirit of empathy/Love which is the Good in mankind and which is the common Truth that exists which we all will eventually come to learn.