"To travel is to discover that everyone is wrong about other countries."
A map of the world which does not include Utopia is not worth even glancing at.
The best way to learn mathematics is to do mathematics.
Customer satisfaction should be the driving force behind every business decision.
Fear is the main source of superstition, and one of the main sources of cruelty. To conquer fear is the beginning of wisdom, in the pursuit of truth as in the endeavour after a worthy manner of life.