The thing about most blogs is that they're where people share their knowledge or discoveries. They're from people positioning themselves as experts in a certain subject matter, and then sharing (a fraction of) their expertise.
But in reality, nobody knows anything, and we all know that. Nobody knows where we go when we die; exactly what happened at the beginning of the world; or how to open a wormhole to travel to far away galaxies.
In fact, what we DO know (or is that 'can' know?) pales in comparison, and is extremely prone to date rapidly. Sure, you can memorise all the biographies of your favourite sports team, but in a few years that whole team will be different.
We recognise we shouldn't be fearful, and we recognise that we shouldn't be arrogant, and that's what makes striving to be confident so admirable: it's admitting that you've got no reason to be (given the vast number of unknowns in the Universe), but quietly stating that you have faith in yourself and then applying that faith through action.
Action for what purpose?
Filling a blank slate.