That Man, I Think, Has Had A

Every Great Advance In Natural Knowledge Has Involved The Absolute Rejection Of Authority.

From The Dawn Of Exact Knowledge To The Present Day, Observation, Experiment, And Speculation Have Gone Hand In Hand; And, Whenever Science Has Halted Or Strayed From The Right Path, It Has Been, Either Because Its Votaries Have Been Content With Mere Unverified Or Unverifiable Speculation (and This Is The Commonest Case, Because Observation And Experiment Are Hard Work, While Speculation Is Amusing); Or It Has Been, Because The Accumulation Of Details Of Observation Has For A Time Excluded Speculation.

A Man's Worst Difficulties Begin When He Is Able To Do As He Likes.

Ecclesiasticism In Science Is Only Unfaithfulness To Truth

The Thief And The Murderer Follow Nature Just As Much As The Philanthropist.