The lapse of ages changes all things - time, language, the earth, the bounds of the sea, the stars of the sky, and every thing about, around, and underneath man, except man himself.
The theory that can absorb the greatest number of facts, and persist in doing so, generation after generation, through all changes of opinion and detail, is the one that must rule all observation.
Without books the development of civilization would have been impossible. They are the engines of change, windows on the world, "Lighthouses" as the poet said "erected in the sea of time." They are companions, teachers, magicians, bankers of the treasures of the mind, Books are humanity in print.
The body and mind are continually changing, and are, in fact, only names of series of changeful phenomena, like rivers whose waters are in a constant state of flux, yet presenting the appearance of unbroken streams. Every particle in this body is continually changing; no one has the same body for many minutes together, and yet we think of it as the same body.
Changing the direction of a large company is like trying to turn an aircraft carrier. It takes a mile before anything happens. And if it was a wrong turn, getting back on course takes even longer.
I think there are hard-liners inside of Iran that think it is the right thing to do to oppose us, to seek to destroy Israel, to cause havoc in places like Syria or Yemen or Lebanon, if they don't change at all, we're still better off having the deal.