My reason for using the quote was to show that it starts with the act of one man who believes he can make a difference and through the strength in numbers of those who believe in him can change really be made.
Another Quote from that same speech is
" Few will have the greatness to bend history; but each of us can work to change a small portion of the events, and in the total of all these acts will be written the history of this generation."
Robert F. Kennedy