Duty Is The Necessity To Act Out

In Man (as The Only Rational Creature On Earth) Those Natural Capacities Which Are Directed To The Use Of His Reason Are To Be Fully Developed Only In The Race, Not In The Individual.

In The Kingdom Of Ends Everything Has Either A Price Or A Dignity. Whatever Has A Price Can Be Replaced By Something Else As Its Equivalent; On The Other Hand, Whatever Is Above All Price, And Therefore Admits Of No Equivalent, Has A Dignity. But That Which Constitutes The Condition Under Which Alone Something Can Be An End In Itself Does Not Have Mere Relative Worth, I.e., Price, But An Intrinsic Worth, I.e., A Dignity.

In Every Department Of Physical Science There Is Only So Much Science, Properly So-called, As There Is Mathematics.

Natural Science Physics Contains In Itself Synthetical Judgments A Priori, As Principles. ... Space Then Is A Necessary Representation A Priori, Which Serves For The Foundation Of All External Intuitions.

Beauty Presents An Indeterminate Concept Of Understanding, The Sublime An Indeterminate Concept Of Reason.