One can be very happy without demanding that others should agree with one. Goethe.
One can bear to be rebuked, but not to be laughed at. Molière.
One can live in true freedom, and yet not be unbound. Goethe.
One can live on little, but not on nothing. 45 Pr.
One can never know at the first moment what may, at a future time, separate itself from the rough experience as true substance. Goethe.
One cannot help doing a good office when it comes in one's way. Le Sage.
One cannot say that the rational is always beautiful; but the beautiful is always rational, or at least ought to be so. Goethe.
One cannot speak the truth with false words. Goethe.
One can't shoe a runaway horse. Dutch Pr. 50
One chick keeps a hen busy. Pr.