Progress Has Been Much More General Than

Thus Disbelief Crept Over Me At A Very Slow Rate, But At Last Was Complete. The Rate Was So Slow That I Felt No Distress, And Have Never Since Doubted Even For A Single Second That My Conclusion Was Correct.

...i Believe There Exists, & I Feel Within Me, An Instinct For The Truth, Or Knowledge Or Discovery, Of Something Of The Same Nature As The Instinct Of Virtue, & That Our Having Such An Instinct Is Reason Enough For Scientific Researches Without Any Practical Results Ever Ensuing From Them.

It Is Not The Strongest Of The Species That Survives, Nor The Most Intelligent That Survives. It Is The One That Is The Most Adaptable To Change, That Lives Within The Means Available And Works Co-operatively Against Common Threats.

The More One Thinks, The More One Feels The Hopeless Immensity Of Man's Ignorance.

Besides Love And Sympathy, Animals Exhibit Other Qualities Connected With The Social Instincts Which In Us Would Be Called Moral.