
We can deduce, often, from one part of physics like the law of gravitation, a principle which turns out to be much more valid than the derivation. —
Richard P. Feynman

Leader. Ship. The word 'ship' is hidden inside the word 'leadership,' as its ... derivation. —
Michael Scott

This is the
derivation of that old Yankee proverb that if you can sell a book, you can move sixty tons of weaponry three hundred miles in winter —
Sarah Vowell

Courage is of the heart by derivation,
And great it is. But fear is of the soul. —
Robert Frost