From the 1968 lecture programme:
The surface of almost every physical system behaves differently from its insides, for the surface is directly concerned with the environment., But the larger anything is, the less surface it has relative to its bulk. The meaning is clear: big and small systems function differently, even if they are built on similar patterns. This truth is brought out in the life of mouse, man, and elephant; these animals will be presented, each with his daily requirement of food. Gulliver was in error; he never could have eaten thge food of 1728 Lilliputians. The same topic is pursued in the study of harbours, stars, fruit, furs, balloons... just about everywhere.