A good number of things can be fundamentally explained by understanding that everything is made up.

The absurdity
…
Someone’s idea
Everything is someone’s idea. The ideas that make up a civilization. Things professed and held on to dearly even when originally offered as a suggestion.
Access to information
You’re reading a classic and you find out that it first appeared in 1908. Meaning it was there before you were born. Unless you are over 117 years old. But in your current point of view you might be experiencing it as new information1.
Ancient civilizations with advanced technology
There were people before that had technology that now would seem like something out of a sci-fi movie. They might consider today’s cutting edge as barbaric.
Footnotes
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All the information has always existed even before being synthesized into different forms. ↩