Yet the concept of God has been with all or almost all civilizations. Almost all people know of God or gods.
Argument ad populum
Do you know of many people that are rational who don't know of God or gods? If not, then the concept of God bears up and so does this statement.
try making sense of origins, morality, truth, existence, without first presupposing God
Argument from ignorance.
Demonstrated in arguments such as the moral argument. Make sense of morality from a relativist standpoint. On abortion, why is your preference any better than mine? What is your standard for "better?"
Second, we all make presuppositions about origins. How are those core beliefs made sense of? Those core presuppositions are what hold our worldview together because everything is funneled through them. Since none of us witnessed beginnings of life or the universe we have to interpret the data. We have only the present as the key to the past. Is the present the key? What kind of assumptions do we build into interpreting the evidence/data?
you don't know God via personal experience since you don't trust in Him. You don't see how He works for the better in your life. If you knew God you would not deny Him His existence. If you truly believed He would confirm Himself to you in all things. He would show you and help you to draw near to Him. Your life would be radically altered and affected.
bald assertion
On your part. I'm not the one denying God. You are. I'm not proving God's existence here. I'm relating my personal experience and comparing it to yours, not trying to prove it. If you want reasonable and logical proof I have already invited you to test my truth claims in Post 182 or 191 of the prophecy thread. Instead, you get into these logical fallacy semantic word games.
If you want to test every statement I made, let's go for it and see if what you say is true. Or you can identify what part you say is a bald assertion.
"you don't know God via personal experience since you don't trust in Him."
Is that a true or false statement? Do you trust God? Have you had a personal experience or revelation of God? How can you since you deny Him the likelihood His existence?
"You don't see how He works for the better in your life."
Is this a true or false statement? Do you see how God works in your life? How can you if you deny Him the likelihood of His existence?
"If you truly believed He would confirm Himself to you in all things."
Is this statement true or false? I base it on personal experience, the validation of His word, and a changed life. At one time I denied Him too. This experience has been the witness and testimony of millions of people. It also builds into Hebrews 11:6. How do you validate the experience of a Spirit? I could relay some of those experiences.
When my father died I questioned the meaning of life. Everywhere I went I met Christians who spoke of God. Circumstance after circumstance created this uncomfortable situation of the reality of God by people I met and events in my life. My uncle took me up the local mountains around FishHoek to cut down a tree that was killing off the local habitation. He would quote verses from the Bible to me, like, "As you sow, so shall you reap." I was taken to a tent revival in Durban South Africa by my room-mate in the game reserve I worked on in the lower Transvaal. I begged him to leave since I wasn't interested in hearing the message (we left early). I had a serious accident on the way back from town that put four of us in hospital in Phalaborwa. I learned that the Christian lady on the reserve prayed for our recovery. When I returned to Canada I decided to go to a local Baptist Church. It was there that the message of salvation first sunk into my head. I could go on and on about how I have experienced God directing my life, and also His answer to prayers, how He has looked after me, but I hope that gives you a glimpse.
"He would show you and help you to draw near to Him."
How do you know this is a false statement? Drawing near is a claim of John 6:44. Many people have attested to the work of God's Spirit actively working in their life through answered pray and His hand of providence. Are you stating that these are all bald face assertions? Can you prove it? Are you speaking of things you know nothing of?
"Your life would be radically altered and affected."
Again, I could give you many testimonies of people that have stated as much. C.S. Lewis is one such person. Well-known Ravi Zacharias is another. Do you deny their testimonies? These are not irrational people.