A study of the history of opinion is a necessary preliminary to the emancipation of the mind.
Just this morning, out of a large memory for songs, and having been obsessed by them since childhood, suddenly, at the age of 84, I thought of a song I hadn't thought of in over 50 years. It came into my head unbidden.
Leadership is particularly necessary to ensure ready acceptance of the unfamiliar and that which is contrary to tradition.