Do not worry about what others are doing. Each of us should turn the searchlight inward and purify his or her own heart as much as possible.

Mohandas Gandhi (1869–1948) Indian lawyer, anti-colonial nationalist, political ethicist [Mahatma Gandhi]

Speech, All-India Radio (1948-01-16)
    (Source)

Two weeks before his death. In Louis Fischer, The Life of Mahatma Gandhi, Part 3, ch. 9 "The Last Fast" (1957).