Physics is about questioning, studying, probing nature. You probe, and, if you're lucky, you get strange clues.

Progress has always been achieved by probing well-entrenched and well-founded forms of life with unpopular and unfounded values. This is how man gradually freed himself from fear and from the tyranny of unexamined systems.

The essence of statesmanship is not a rigid adherence to the past but a prudent and probing concern for the future.