There is no such thing as an "atrocity" in warfare that is greater than the atrocity of warfare itself. - Sydney J. Harris

And our resistance against changing our habits of thought is immense and unrelenting. If we try, briefly, we find it ass vexing and unrewarding as writing a letter with the left hand. What we are used to is comfortable; what is comfortable is good; and what is good is right - this is the unspoken belief of almost all people everywhere. When a scientist, however, tackles a problem that has hitherto seemed insoluble, he abandons all his preconceptions, and all the preconceptions of the past. Only when he begins to question the basic assumptions he has always held can he make an utterly fresh start, unencumbered by the intellectual baggage of the past.

As Bernard Shaw said, “He who can, does: he who cannot, teaches.” But, as Sydney J. Harris put it, “Let’s revise Shaw’s foolish saying to ‘He who can, does; he who understands, teaches.

"Patriotism is proud of a country's virtues and eager to correct its deficiencies; it also acknowledges the legitimate patriotism of other countries, with their own specific virtues. The pride of nationalism, however, trumpets its country's virtues and denies its deficiencies, while it is contemptuous toward the virtues of other countries. It wants to be, and proclaims itself to be, "the greatest", but greatness is not required of a country; only goodness is."