A Theory That Explains Everything, Explains Nothing

We Have The Right Not To Tolerate The Intolerant. We Should Tolerate Even Them Whenever We Can Do So Without Running A Great Risk; But The Risk May Become So Great That We Cannot Allow Ourselves The Luxury.

It Is A Myth That The Success Of Science In Our Time Is Mainly Due To The Huge Amounts Of Money That Have Been Spent On Big Machines. What Really Makes Science Grow Is New Ideas, Including False Ideas.

It Is Easy To Obtain Confirmations, Or Verifications, For Nearly Every Theory-if We Look For Confirmations. Confirmations Should Count Only If They Are The Result Of Risky Predictions... A Theory Which Is Not Refutable By Any Conceivable Event Is Non-scientific. Irrefutability Is Not A Virtue Of A Theory (as People Often Think) But A Vice. Every Genuine Test Of A Theory Is An Attempt To Falsify It, Or Refute It.

We Do Not Choose Political Freedom Because It Promises Us This Or That. We Choose It Because It Makes Possible The Only Dignified Form Of Human Coexistence, The Only Form In Which We Can Be Fully Responsible For Ourselves. Whether We Realize Its Possibilities Depends On All Kinds Of Things — And Above All On Ourselves.

There Can Be No Ultimate Statements Science: There Can Be No Statements In Science Which Can Not Be Tested, And Therefore None Which Cannot In Principle Be Refuted, By Falsifying Some Of The Conclusions Which Can Be Deduced From Them.