Knowledge, Aristotle

All teaching and all intellectual learning come about from already existing knowledge.

- Aristotle, Posterior Analytics (71a 1), tr. by Jonathan Barnes (1984/95)

Other translations of this quote:
All doctrine, and all intellectual discipline, arise from pre-existent knowledge, O.F. Owen (1853)
All communications of knowledge from teacher to pupil by way of reasoning pre-suppose some pre-existing knowledge., E.S. Bouchier (1901)
All instruction given or received by way of argument proceeds from pre-existent knowledge, G.R.G. Mure (1928)

http://en.wikiquote.org/wiki/Knowledge

Attitude, Tom Blandi

Our attitudes control our lives. Attitudes are a secret power working 24 hours a day for good or bad. It is of paramount importance that we know how to harness and control this great force.

~ Tom Blandi ~