Certainty (n.) makes for peace: clear truths remove the ground of dispute and dispose minds to gentleness and concord.
Certainty (n.) is judging that a thing cannot possibly be otherwise than we think it — guaranteed only because God, the source of truth, gave us a faculty that cannot fail when used rightly.
Certainty (n.) needs only one point to move the world, as Archimedes asked only one firm, immovable spot to move the globe.
Certainty (n.) might in the end be only this: that nothing is certain.
Certainty (n.) ends the anxiety of desire: when we are sure what we want will happen, we go on wanting it but stop being agitated by wanting it.
Certainty (n.) needs no more than seeing very clearly; whatever we conceive clearly and distinctly is true — though it is hard to tell which things we conceive distinctly.