All Our Knowledge Is Symbolic.

It Is Natural To Man To Regard Himself As The Final Cause Of Creation.

Too Rigid Scruples Are Concealed Pride.

There Is Nothing So Terrible As Activity Without Insight.

With The Growth Of Knowledge Our Ideas Must From Time To Time Be Organized Afresh. The Change Takes Place Usually In Accordance With New Maxims As They Arise, But It Always Remains Provisional.

How Often Do I Lull My Seething Blood To Rest, For You Have Never Seen Anything So Unsteady, So Uncertain, As This Heart.