Nature conceals her secrets because she is sublime, not because she is a trickster.

What I see in Nature is a grand design that we can understand only imperfectly, one with which a responsible person must look at with humility.

[Mystery] is the fundamental emotion that stands at the cradle of true art and true science.

Don't dream of being a good person, be a human being is valuable and gives value to life.

Physical concepts are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world.

The devil has put a penalty on all things we enjoy in life. Either we suffer in our health, or we suffer in our soul, or we get fat.

Common sense consists of those layers of prejudice laid down before the age of 18.