Can we gain knowledge of God based on observed facts and experience apart from divine revelation?
50+ years ago in the US, the culture still accepted the truth of the Bible. Evangelists like Josh McDowell or Billy Graham could expound truths in the Bible to lead people to the gospel message.
Today no such assumptions are held by our culture. Trying to convince them that the Bible is a legitimate source of knowledge, let alone "truth," meets with derision or at best, suspicion.
And yet we spend our entire lives gaining knowledge about our world by using our faculties.
Memory
Testimony
Sense perception
Rationality
Introspection
These faculties are all potentially defeatable (fancy term meaning they can be wrong from time to time). Despite the fact that a stick appears to bend when we put it in the water, through the use of our other faculties (memory, rationality, and introspection) we overcome our misunderstanding of our sense experience alone.
When we perceive that the universe began to exist what does that imply?
When we recognize that nothing can't possibly produce something, what does that imply?
We perceive desires such as the one to live a meaningful existence, again what does that imply?
When we experience natural beauty do we stop and ask why is anything beautiful? What would create a universal standard of beauty?
When we are upset that someone mistreated us do we ask why is there a moral value or duty to treat people a certain way? What is the origin of that duty? To whom do we owe that duty?
There are dozens of similar questions that lead one to the inference of a Creator.
Please feel free to comment on other features of our world that appear, upon some careful reflection, to be transcendent in their origin.
Or are these just brute facts? Or perhaps accidents or coincidental to evolution and therefore not actual features of our external world but rather delusions?