In addition to Harkin's philosophy on the economic value of parks, Harkin also saw parks as being a way for Canadians to imbue the beauty of Canadian scenery in an accessible manner, be it by car or train to reach park grounds. But, as his annual reports as commissioner show, he also felt there was a higher purpose to exposing more individuals to Canada's scenic beauty beyond mere aesthetics. In Harkin's earlier years as Parks Commissioner, he expressed on many occasions that parks allowed for the fostering of what he coins the "play spirit", which is the rejuvenation of the human spirit from the daily stresses of life through outdoor recreation. This need not be physical recreational activity; however, breathing in fresh air and being within close proximity of nature is an important part of this rejuvenation process. This aspect of Harkin's philosophy in viewing parks as national recreational grounds for therapeutic and rejuvenating effects was in part due to the influence of American wilderness preservationists, John Muir and Henry David Thoreau, both of whom Harkin had quoted in his departmental reports.