|Grocott & Ward, comps. Grocotts Familiar Quotations, 6th ed. 189-?.|
|Every mind was made for growth, for knowledge; and its nature is sinned against when it is doomed to ignorance.|
William E. Channing.The Present Age.
|Skill in the arts is mental power exercised in arts, that is all.|
Rufus Choate.Addresses and Orations: The Power of a State developed by Mental Culture.
|Stern men with empires in their brains.|
Lowell.The Biglow Papers.