A full and candid admission of one's mistakes should make proof against its repetition.
Mahatma GandhiH. G. Wells was not the only one to mention Churchill and Hitler in the same breath: "Churchill and Hitler are striving to change the nature of their respective countrymen by forcing and hammering violent methods on them. Man may be suppressed in this manner but he cannot be changed. Ahimsa [non-violence in the Hindu tradition], on the other hand, can change human nature and sooner than men like Churchill and Hitler."
Mahatma Gandhi