“The deeper we get into reality, the more numerous will be the questions we cannot answer.”

“If we never ask questions, we never get answers. If we never get answers, we never progress.”

“We get wise by asking questions, and even if these are not answered we get wise, for a well-packed question carries its answer on its back as a snail carries its shell.”

“In some cases we learn more by looking for the answer to a question and not finding it than we do from learning the answer itself.”

“The older you get, the more questions you get asked, and the more weary you become of answering the questions and the more elusive the answers--any answer, every answer--seem. --Maureen O'Toople in the short story "Your Question for Author Here”

“We never stop investigating. We are never satisfied that we know enough to get by. Every question we answer leads on to another question. This has become the greatest survival trick of our species.”