Don't Become A Mere Recorder Of Facts,

The Digestive Canal Represents A Tube Passing Through The Entire Organism And Communicating With The External World, I.e. As It Were The External Surface Of The Body, But Turned Inwards And Thus Hidden In The Organism.

Never Think That You Already Know All. However Highly You Are Appraised, Always Have The Courage To Say To Yourself-i Am Ignorant.

Possibilities Are Like The Wings Of Birds; They Allow Man To Soar And To Climb To The Heavens. And Facts Are Like The Atmosphere Against Which Those Wings Must Beat, And Without Which The Soaring Bird Will Surely Plummet Back To Earth.

Don't Become A Mere Recorder Of Facts, But Try To Penetrate The Mystery Of Their Origin.

Edible Substances Evoke The Secretion Of Thick, Concentrated Saliva. Why? The Answer, Obviously, Is That This Enables The Mass Of Food To Pass Smoothly Through The Tube Leading From The Mouth Into The Stomach.