光是理解世界的关键。
Light is the key to understanding the world.
One foul sentence does more hurt than many foul examples. For these do but corrupt the stream；the other corrupt the fountain.
"Un libro es una conversación entre el autor y el lector, un diálogo que trasciende el tiempo y el espacio."
在不确定的时期，目标的清晰性变得更加关键。
To study ancient DNA is to converse with the dead.
"Destroying things is much easier than making them."