Like God. There isn't any evidence that God really exists right? I believe God exists because he was the one who made the planets, the sky, the sun, the moon, the earth etc. So why do people believe in things that nobody else would actually believe exists? I've been puzzled over this for the past 2 days.
First of all, wow, what a question, and Yeah, that's a question probably everyone in the world has been thinking... I don't know the exact answer but what I can comprehend is that everyone thinks that they can live forever, Or that they've died and then came back to life and saying if they saw God etc. I'm not sure why people believe in things that nobody else would actually believe exists. But a very good question you asked.
In my opinion, we believe in those things because we need to.
Imagine living in a world where either you only believe in what you already know, or you literally know everything. Where, if something bad happened, you can't pray to a certain something for it to get better again. Life would loose an important aspect.
So humanity has always developed things we could believe in. God, Aliens and so on.
And some of those beliefs really succeeded because they just can't prove it right or wrong. And never will. That's the magic.
Since this is a question about belief and not about religion, I want to add that we also believe in love, hope, and other emotions that we can't see. Some people don't feel emotions or block certain emotions. They emulate (fake) these feelings based on other people's reactions but they do not know they exist because they do not feel them.
So, if you can feel it, believe it. We do not know what others may feel. We can only try and read their reactions. If someone says they believe in something, I cannot deny it because I am not them and may or may not feel it.
Your Right to Believe
You probably cherish your right to believe whatever you wish to believe. So does almost everyone else. By exercising this right, earth’s six billion inhabitants have produced an amazing diversity of beliefs. Like the variations in color, shape, texture, taste, smell, and sound that we find in creation, differing beliefs often add interest, excitement, and enjoyment to life. Such variety can, indeed, be the spice of life.—Psalm 104:24.
Of course, it does not take deliberate lies to develop mistaken beliefs. At times, we just misread things. How many people have met untimely deaths doing something they believed was right? Then again, often we believe a thing simply because we want to believe it. One professor says that even scientists “often fall in love with their own constructions.” Their beliefs becloud their critical judgment. Then they may spend a lifetime in vain trying to shore up mistaken beliefs.—Jeremiah 17:9.
For more information on this subject and others, please go to jw.org "Online Library." Also for free downloads, publications or read online.