Incommensurables Cannot Be Compared.

The Rational Herdsman Concludes That The Only Sensible Course For Him To Pursue Is To Add Another Animal To His Herd. And Another; And Another . . . But This Is The Conclusion Reached By Each And Every Rational Herdsman Sharing A Commons. Therein Is The Tragedy. Each Man Is Locked Into A System That Compels Him To Increase His Herd Without Limit — In A World That Is Limited. Ruin Is The Destination Toward Which All Men Rush, Each Pursuing His Own Best Interest In A Society That Believes In The Freedom Of The Commons. Freedom In A Commons Brings Ruin To All.

A Coldly Rationalist Individualist Can Deny That He Has Any Obligation To Make Sacrifices For The Future.

The Morality Of An Act Is A Function Of The State Of The System At The Time It Is Performed.

The Three Filters [against Folly] Operate Through These Particular Questions: Literacy: What Are The Words? Numeracy: What Are The Numbers? Ecolacy: And Then What?

The Exquisite Sight, Sound, And Smell Of Wilderness Is Many Times More Powerful If It Is Earned Through Physical Achievement, If It Comes At The End Of A Long And Fatiguing Trip For Which Vigorous Good Health Is Necessary. Practically Speaking, This Means That No One Should Be Able To Enter A Wilderness By Mechanical Means.