Reason Is Nothing Without Imagination.

How Can You Be Certain That Your Whole Life Is Not A Dream?

These Long Chains Of Perfectly Simple And Easy Reasonings By Means Of Which Geometers Are Accustomed To Carry Out Their Most Difficult Demonstrations Had Led Me To Fancy That Everything That Can Fall Under Human Knowledge Forms A Similar Sequence; And That So Long As We Avoid Accepting As True What Is Not So, And Always Preserve The Right Order Of Deduction Of One Thing From Another, There Can Be Nothing Too Remote To Be Reached In The End, Or To Well Hidden To Be Discovered.

The Reading Of All Good Books Is Like A Conversation With The Finest Minds Of Past Centuries.

The Mind Effortlessly And Automatically Takes In New Ideas, Which Remain In Limbo Until Verified Or Rejected By Conscious, Rational Analysis.

Thus Each Truth Discovered Was A Rule Available In The Discovery Of Subsequent Ones.