Creative energy is more critical than learning.
Love is a better teacher than duty.
Our separation from each other is an optical illusion.
How insidious Nature is when one is trying to get at it experimentally.
Berlin is the place to which I am most closely bound by human and scientific ties.
One ought to be ashamed to make use of the wonders of science embodied in a radio set, the while appreciating them as little as a cow appreciates the botanic marvels in the plants she munches.