Knowledge of other peoples beliefs and ways of thinking must be used to build bridges, not to create conflicts. – Kjell Magne Bondevik

Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones. – Arthur Conan Doyle

Having knowledge but lacking the power to express it clearly is no better than never having any ideas at all. – Pericles