Emptying the mind is the greatest activity. It seems as if you are doing nothing. It seems like escapism and selfishness to those who are egocentric. But only one among millions can do it. Read Swami Amar Jyoti's Satsang to learn more.
Satyagraha was Gandhi's peaceful protest movement in India that triggered the drive for independence in that country. Here's the story of an old Muslim gentleman who followed Gandhi and has practiced Gandhian precepts for fifty years.