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It Is The Responsibility Of Scientists Never To Suppress Knowledge, No Matter How Awkward That Knowledge Is, No Matter How It May Bother Those In Power; We Are Not Smart Enough To Decide Which Pieces Of Knowledge Are Permissible, And Which Are Not.

You Can Get Into A Habit Of Thought In Which You Enjoy Making Fun Of All Those Other People Who Don't See Things As Clearly As You Do. We Have To Guard Carefully Against It.

We Humans Look Rather Different From A Tree. Without A Doubt We Perceive The World Differently Than A Tree Does. But Down Deep, At The Molecular Heart Of Life, The Trees And We Are Essentially Identical.

The Prediction I Can Make With The Highest Confidence Is That The Most Amazing Discoveries Will Be The Ones We Are Not Today Wise Enough To Foresee.

It Seems Madness To Say, 'we're Worried That They're Going To Become Addicted To Marijuana' -- There's No Evidence Whatever That It's An Addictive Drug, But Even If It Were, These People Are Dying, What Are We Saving Them From?