In the alchemy of man's soul almost all noble attributes- courage, honor, love, hope, faith, duty, loyalty, and so on - can be transmuted into ruthlessness. Compassion alone stands apart from the continuous traffic between good and evil proceeding within us. Compassion is the antitoxin of the soul: where there is compassion, even the most poisonous impulses remain relatively harmless.
Eric Hoffer (1982). “Between the Devil and the Dragon: The Best Essays and Aphorisms of Eric Hoffer”, HarperCollins Publishers