The real madness probably is not another thing that the wisdom itself that, tired of discovering the shames of the world, has taken the intelligent r… - Heinrich Heine

Where they burn books, they will also ultimately burn people.

Do not smile at my advice -- the advice of a dreamer who warns you against Kantians, Fichteans, and philosophers of nature. Do not smile at the visionary who anticipates the same revolution in the realm of the visible as has taken place in the spiritual. Thought precedes action as lightning precedes thunder. German thunder is of true Germanic character; it is not very nimble, but rumbles along ponderously. Yet, it will come and when you hear a crashing such as never before has been heard in the world's history, then you know that the German thunderbolt has fallen at last. At that uproar the eagles of the air will drop dead, and lions in the remotest deserts of Africa will hide in their royal dens. A play will be performed in Germany which will make the French Revolution look like an innocent idyll.

…near them grow dreamlike fairy-tale flowers whose leaves stir in the moonlight.