One Finds Limits By Pushing Them.

Learning Is Any Change In A System That Produces A More Or Less Permanent Change In Its Capacity For Adapting To Its Environment.

Learning Results From What The Student Does And Thinks, And Only From What The Student Does And Thinks. The Teacher Can Advance Learning Only By Influencing The Student To Learn.

The Aim ... Is To Provide A Clear And Rigorous Basis For Determining When A Causal Ordering Can Be Said To Hold Between Two Variables Or Groups Of Variables In A Model . . . . The Concepts Refer To A Model-a System Of Equations-and Not To The 'real' World The Model Purports To Describe.

Because He Treats The World As Rather Empty And Ignores The Interrelatedness Of All Things (so Stupefying To Thought And Action), Administrative Man Can Make Decisions With Relatively Simple Rules Of Thumb That Do Not Make Impossible Demands Upon His Capacity For Thought.

Enlightenments, Like Accidents, Happen Only To Prepared Minds.