Answer: Love of Country
Explanation: The textbook whose advice applies is love of country.
Garibaldi's quote has cleared the air on the reasons why nationalism is closely connected to other characteristic -- love of country.
The idea of nationalism denotes nothing but the love of country. The love of his/her country and its residents is the primary objective of every reasonable Nationalist. By so doing, Nationalists protect their culture, its traditions and heritage, its kit and kin amongst other essential things. Garibaldi to avoid any iota of doubt stated the idea not only in a correct but accurate form when he said: “let him who loves his country in his hear and not from his lips only, follow me.” It should also be noted that one of the major goals of Nationalist is to prevent his/her country from any foreign influences that could be detrimental to his/hers.