do you ever fear that you know nothing at all?

[Tulip]

i fear that sometimes, that nothing i know has any basis in reality and in fact is just a product of my own misguided perceptions

It is always good to check your perception against objective facts so that it is not too far from reality.
In many cases, "reality" is not that absolute. It can actually be something that is relative to people's perceptions.

:ranger:

 

[muir]

The more i learn the more i realise how little i know

 

[Peppermint]

I don't fear it, I accept it; it's a valid possibility.