Warren Buffett on how size will limit performance

We face another obstacle: In a finite world, high growth rates must self-destruct. If the base from which the growth is taking place is tiny, this law may not operate for a time. But when the base balloons, the party ends: A high growth rate eventually forges its own anchor. 

~ Warren Buffett, Berkshire Hathaway 1989 Annual Report, March 2, 1990