If It Works, It's True.

Don't Preach Too Much To Your Pupils Or Abound In Good Talk In The Abstract. Lie In Wait Rather For The Practical Opportunities, Be Prompt To Seize Those As They Pass, And Thus At One Operation Get Your Pupils Both To Think, To Feel, And To Do.

The Ultimate Test Of What A Truth Means Is The Conduct It Dictates Or Inspires.

True Ideas Are Those That We Can Assimilate, Validate, Corroborate, And Verify. False Ideas Are Those That We Cannot. That Is The Practical Difference It Makes To Us To Have True Ideas; That Therefore Is The Meaning Of Truth, For It Is All That Truth Is Known As.

Geniuses Are Commonly Believed To Excel Other Men In Their Power Of Sustained Attention . . . But It Is Their Genius Making Them Attentive, Not Their Attention Making Geniuses Of Them.

Philosophy, Beginning In Wonder, As Plato And Aristotle Said, Is Able To Fancy Everything Different From What It Is. It Sees The Familiar As If It Were Strange, And The Strange As If It Were Familiar. It Can Take Things Up And Lay Them Down Again. It Rouses Us From Our Native Dogmatic Slumber And Breaks Up Our Caked Prejudices.