Reading is to the mind what exercise is to the body.
A good comedy is like a good wine—it gets better with age.
It is the duty of a student to get everything out of a teacher， and the duty of a teacher to get everything out of a student.
In the quantum world, observing something changes it. This is not a limitation of our technology, but a fundamental property of nature.
"Un libro es una conversación íntima entre el autor y el lector a través del tiempo."