Everyone has their own opinions on every topic, religion being one of, if not the most controversial topics. There are two extremes among religious views: Absolutism and Relativism. To an absolutist, there is only one possible truth, and it has to be their own. To a Relativist, all beliefs are equally valid (except, of course, the belief that all beliefs are equally valid, which is apparently more valid than any belief that says otherwise).
The typical image of two people arguing over whether they are looking at a 6 or a 9 shows how our individual perspectives affect how we see the world. My perspective leads me to be a faithful Christian. Yours might lead you to be something else. I've seen things you haven't, you've seen things I haven't, and more importantly the things we have in common, we have seen from different angles. That's how you've chosen your religion, and it's how I've chosen mine.
But although there are different perspectives that can legitimately lead one to a conclusion through reason alone, they can legitimately lead one to the wrong answer. As you can see, in the header image, I have added to the classic 6/9 debate by adding an entire sequence of numbers in front of it (and yes, I am aware of the difference in font, but it's the closest I could get with the app I used). With added information, we can see that the one who believes it is a six, however reasonably he came to his conclusion, is factually wrong, because his perspective is wrong.
To add an extra layer, the one who thinks it's a six could argue that 9 isn't necessarily the next number in the sequence, so he's still right. After all, just because all the other numbers are in numerical order doesn't mean the 9 necessarily had to follow. Perhaps it's a passcode, and the one who wrote it down flipped it so he wouldn't forget the code, but also no one else could steal it because no one else would know the 6 had been flipped. Maybe that's even why the 9 is a different font. It's not because Brian was too lazy to cover up the original 9 and add the 9 back in the correct font. But at this point, it's not about getting the right answer, but about being committed to the wrong answer. This goes beyond different perspectives and instead enters the realm of dishonesty.
According to Psalm 111:10, Proverbs 1:7, and Proverbs 9:10, the fear of the Lord is the beginning of wisdom and knowledge. Starting with God, we start at the correct perspective, and are able to construct true worldviews. This doesn't always lead to perfect truth, of course. God's infallibility is not transferable. But it does give us a significant boost. This much has been evident throughout history. Wherever Christianity is free, advancements follow. Even unbelievers must borrow from the Christian worldview when they do science. When we start with God, our perspective will lead us to truth. When we start with man, we're not as likely to find it.