The Liskov Substitution Principle is a fundamental concept in object-oriented programming, ensuring that derived classes can be used in place of their base classes without altering the correctness of the program.

The art of reading is in great part that of acquiring a better understanding of life from one's encounter with it in a book.

The secret of life is to appreciate the pleasure of being terribly, terribly deceived.

The cement industry must evolve or become obsolete.

The theory of probabilities is at bottom nothing but common sense reduced to calculus.