Quotation by Henry David Thoreau

For the most part, an author consults only with all who have written before him upon a subject, and his book is but the advice of so many. But a good book will never have been forestalled, but the topic itself will in one sense be new, and its author, by consulting with nature, will consult not only with those who have gone before, but with those who may come after. There is always room and occasion enough for a true book on any subject; as there is room for more light the brightest day, and more rays will not interfere with the first.