The first and wisest of them all profess'd
To know this only, that he nothing knew.
--John Milton, Paradise Regained
All of these appear self-explanatory enough, no need to comment. Hooray.
Spoiler: certainty, faith and knowledge quotes (click to see content)
Men are forever looking for the one point, the singular fulcrum they can use to dislodge all competing claims. Ignorance does not give us this. What it provides, rather, is the possibility of comparison, the assurance that not all claims are equal. And this, Ajencis would argue, is all that we need. For so long as we admit our ignorance, we can hope to improve our claims, and so long as we can improve our claims, we can aspire to the Truth, even if only in rank approximation.
--R. Scott Bakker, The Thousandfold Thought