For since the creation of the world God’s invisible qualities—his eternal power and divine nature—have been clearly seen, being understood from what has been made, so that people are without excuse. -- Romans 1:20 (NIV)But the book of Romans also tells us about truth being suppressed. It seems to me that a lot of God's truth has been suppressed. So it might not be the case that each individual suppresses the truth for themselves, but they might be victims of other people suppressing it for them.
I believe it is hugely important for this information to be public knowledge, and not just kept by the intellectual elites who's careers revolve around it. There is far too much misinformation in the world, especially with the internet and the ease that anybody can share their opinions. There are people who believe that the Earth is flat, there are people who believe that we never landed on the moon, there are people who believe dinosaurs never existed, there are people who think the Holocaust never happened. These are extreme cases, but just like these people, there are many people in the world who have been duped by other ideas in exactly the same way. People believe that all cowboys wore stetsons, people believe that knights needed to be put on horses by crane, people believe that Captain Kirk said "Beam me up Scotty". Misinformation spreads easily, and for many reasons. When this happens, the truth becomes suppressed. So it is very important that we take care to check what we believe and make sure it lines up with truth.
So what follows are a few reasons, based entirely in truth, that tell us without doubt that God is real. I aim to keep this as simple as possible, so I will not go into much depth on each, and I encourage you to read more on any subject that takes your interest. I'll also comment that these are not even all of the reasons that are available to us. This is just a small selection of some of the best.