Self-knowledge Comes From Knowing Other Men.

There Is No Permanence In Doubt; It Incites The Mind To Closer Inquiry And Experiment, From Which, If Rightly Managed, Certainty Proceeds, And In This Alone Can Man Find Thorough Satisfaction.

For Many People, One Of The Most Frustrating Aspects Of Life Is Not Being Able To Understand Other People's Behavior.

There Is Nothing More Fearful Than Imagination Without Taste. [ger., Es Ist Nichts Furchterlicher Als Einbildungskraft Ohne Geschmack.]

To Know Where A Thing Is We Must Have Found It.

No One Can Take From Us The Joy Of The First Becoming Aware Of Something, The So-called Discovery. But If We Also Demand The Honor, It Can Be Utterly Spoiled For Us, For We Are Usually Not The First. What Does Discovery Mean, And Who Can Say That He Has Discovered This Or That? After All It's Pure Idiocy To Brag About Priority; For It's Simply Unconscious Conceit, Not To Admit Frankly That One Is A Plagiarist.