Those numbers may not sound like a big deal until one reflects that average global temperatures were "only" 5 degrees cooler at the height of the last Ice Age. Collapse: How Societies Choose to Fail or Succeed

Tell me to what you pay attention and I will tell you who you are. Man and Crisis

Men are disturbed, not by things, but by the principles and notions which they form concerning things. The Enchiridion

When a simple man who has no skill in dialectics believes an argument to be true which he afterwards imagines to be false, whether really false or not, and then another and another, he no longer has any faith left, and great disputers, as you know, come to think, at last that they have grown to be the wisest of mankind; for they alone perceive the utter unsoundness and instability of all arguments, or, indeed, of all things, which like the currents in the Euripus, are going up and down in never-ceasing ebb and flow. The Trials Of Socrates